Charles H. Spurgeon on Psalms 128:4

Behold, that thus shall the man be blessed that feareth the LORD. Mark this. Put a Nota Bene against it, for it is worthy of observation. It is not to be inferred that all blessed men are married, and are fathers; but that this is the way in which the Lord favours godly people who are placed in domestic life. He makes their relationships happy and profitable. In this fashion does Jehovah bless God fearing households, for he is the God of all the families of Israel. We have seen this blessing scores of times, and we have never ceased to admire in domestic peace the sweetest of human felicity. Family blessedness comes from the Lord, and is a part of his plan for the preservation of a godly race, and for the maintenance of his worship in the land. To the Lord alone we must look for it. The possession of riches will not ensure it; the choice of a healthy and beautiful bride will not ensure it; the birth of numerous comely children will not ensure it: there must be the blessing of God, the influence of piety, the result of holy living.