{k} That our sons may be as plants grown up in their youth; that our daughters may be as corner stones, polished after the similitude of a palace:

(k) He desires God to continue his benefits toward his people, counting the procreation of children and their good education among the chiefest of God's benefits.

Wesley's Notes

144:12 That - This mercy I beg not only for my own sake, but for the sake of thy people, that they may enjoy those blessings which thou hast promised them; and particularly, that our sons, who are the strength and hopes of a nation, may be like plants, flourishing and growing in height and strength, as plants do in their youth; for when they grow old, they wither and decay. Cornerstone - Strong and beautiful.

King James Translators' Notes

polished: Heb. cut

Matthew Henry's Concise Commentary

144:9-15 Fresh favours call for fresh returns of thanks; we must praise God for the mercies we hope for by his promise, as well as those we have received by his providence. To be saved from the hurtful sword, or from wasting sickness, without deliverance from the dominion of sin and the wrath to come, is but a small advantage. The public prosperity David desired for his people, is stated. It adds much to the comfort and happiness of parents in this world, to see their children likely to do well. To see them as plants, not as weeds, not as thorns; to see them as plants growing, not withered and blasted; to see them likely to bring forth fruit unto God in their day; to see them in their youth growing strong in the Spirit. Plenty is to be desired, that we may be thankful to God, generous to our friends, and charitable to the poor; otherwise, what profit is it to have our garners full? Also, uninterrupted peace. War brings abundance of mischiefs, whether it be to attack others or to defend ourselves. And in proportion as we do not adhere to the worship and service of God, we cease to be a happy people. The subjects of the Saviour, the Son of David, share the blessings of his authority and victories, and are happy because they have the Lord for their God.