Proverbs are not laws, they are proverbs. They are good advice, and sometimes also state the likely result of taking such good advice. However, not everyone who takes that good advice will see that exact result - they're just more likely to.
Does Proverbs 20:13 mean that every person who keeps awake and doesn't sleep too much will always have plenty of bread and are immune from famine? Of course not. It means if you don't waste too much time sleeping you're more likely to have food security. But there are a lot more factors involved that can affect that outcome.
A proverb is not a promise. It is advice to increase the probability of a favourable outcome.
That's why I pointed out that the Proverb is just a reminder of what the whole counsel says. There are plenty of good promises of raising up Yah fearing children. The Proverb points you back to what the promises say.
Deuteronomy 4
1¶'And now, Israel, hearken unto the statutes, and unto the judgments which I am teaching you to do, so that ye live, and have gone in, and possessed the land which Jehovah God of your fathers is giving to you.
2Ye do not add to the word which I am commanding you, nor diminish from it, to keep the commands of Jehovah your God which I am commanding you.
3'Your eyes are seeing that which Jehovah hath done in Baal-Peor, for every man who hath gone after Baal-Peor, Jehovah thy God hath destroyed him from thy midst;
4and ye who are cleaving to Jehovah your God, are alive, all of you, to-day.
5¶'See, I have taught you statutes and judgments, as Jehovah my God hath commanded me -- to do so, in the midst of the land whither ye are going in to possess it;
6and ye have kept and done them (for it is your wisdom and your understanding) before the eyes of the peoples who hear all these statutes, and they have said, Only, a people wise and understanding is this great nation.
7¶'For which is the great nation that hath God near unto it, as Jehovah our God, in all we have called unto him?
8and which is the great nation which hath righteous statutes and judgments according to all this law which I am setting before you to-day?
9'Only, take heed to thyself, and watch thy soul exceedingly, lest thou forget the things which thine eyes have seen, and lest they turn aside from thy heart, all days of thy life; and thou hast made them known to thy sons, and to thy sons' sons.
Deuteronomy 6
1¶'And this is the command, the statutes and the judgments which Jehovah your God hath commanded to teach you, to do in the land which ye are passing over thither to possess it,
2so that thou dost fear Jehovah thy God, to keep all His statutes and His commands, which I am commanding thee, thou, and thy son, and thy son's son, all days of thy life, and so that thy days are prolonged.
3'And thou hast heard, O Israel, and observed to do, that it may be well with thee, and that thou mayest multiply exceedingly, as Jehovah, God of thy fathers, hath spoken to thee, in the land flowing with milk and honey.
4¶'Hear, O Israel, Jehovah our God is one Jehovah;
5and thou hast loved Jehovah thy God with all thy heart, and with all thy soul, and with all thy might,
6¶and these words which I am commanding thee to-day have been on thine heart,
7and thou hast repeated them to thy sons, and spoken of them in thy sitting in thine house, and in thy walking in the way, and in thy lying down, and in thy rising up,
8and hast bound them for a sign upon thy hand, and they have been for frontlets between thine eyes,
9and thou hast written them on door-posts of thy house, and on thy gates.
10¶'And it hath been, when Jehovah thy God doth bring thee in unto the land which He hath sworn to thy fathers, to Abraham, to Isaac, and to Jacob, to give to thee -- cities great and good, which thou hast not built,
11and houses full of all good things which thou hast not filled, and wells digged which thou hast not digged, vineyards and olive-yards which thou hast not planted, and thou hast eaten, and been satisfied;
12'Take heed to thyself lest thou forget Jehovah who hath brought thee out of the land of Egypt, out of a house of servants;
13Jehovah thy God thou dost fear, and Him thou dost serve, and by His name thou dost swear;
14ye do not go after other gods, of the gods of the peoples who are round about you;
15for a zealous God is Jehovah thy God in thy midst -- lest the anger of Jehovah thy God burn against thee, and He hath destroyed thee from off the face of the ground.
Isaiah 54
13And all thy sons are taught of Jehovah, And abundant is the peace of thy sons.
14In righteousness thou establishest thyself, Be far from oppression, for thou fearest not, And from ruin, for it cometh not near unto thee.
Deuteronomy 11
18¶'And ye have placed these my words on your heart, and on your soul, and have bound them for a sign on your hand, and they have been for frontlets between your eyes;
19and ye have taught them to your sons, by speaking of them in thy sitting in thy house, and in thy going in the way, and in thy lying down, and in thy rising up,
20and hast written them on the side-posts of thy house, and on thy gates,
21so that your days are multiplied, and the days of your sons, on the ground which Jehovah hath sworn to your fathers to give to them, as the days of the heavens on the earth.
22¶'For, if ye diligently keep all this command which I am commanding you -- to do it, to love Jehovah your God, to walk in all His ways, and to cleave to Him,
23then hath Jehovah dispossessed all these nations from before you, and ye have possessed nations, greater and mightier than you;
24every place on which the sole of your foot treadeth is yours; from the wilderness, and Lebanon, from the river, the river Phrat, even unto the farther sea is your border;
25no man doth station himself in your presence; your dread and your fear doth Jehovah your God put on the face of all the land on which ye tread, as He hath spoken to you.
26¶'See, I am setting before you to-day a blessing and a reviling:
27the blessing, when ye hearken unto the commands of Jehovah your God, which I am commanding you to-day;
28and the reviling, if ye do not hearken unto the commands of Jehovah your God, and have turned aside out of the way which I am commanding you to-day, to go after other gods which ye have not known.
1st Timothy 3
1¶Stedfast is the word: If any one the oversight doth long for, a right work he desireth;
2it behoveth, therefore, the overseer to be blameless, of one wife a husband, vigilant, sober, decent, a friend of strangers, apt to teach,
3not given to wine, not a striker, not given to filthy lucre, but gentle, not contentious, not a lover of money,
4his own house leading well, having children in subjection with all gravity,
5(and if any one his own house how to lead hath not known, how an assembly of God shall he take care of?)
Titus
5¶For this cause left I thee in Crete, that the things lacking thou mayest arrange, and mayest set down in every city elders, as I did appoint to thee;
6if any one is blameless, of one wife a husband, having children stedfast, not under accusation of riotous living or insubordinate --
Paul's qaulifications for an overseer was that children are in order/subjection and also faithful. Faithful children are a testimony of you, unfaithful children can disqualify you.