Psalms 127:4,5 - Joseph Benson’s Commentary on the Old and New Testaments

As arrows are in the hand of a mighty man That knows how to use them for his own safety and advantage; so are children of the youth Children born to their parents when they are young, who are generally the strongest and most healthful children, grow up, and become qualified to serve their parents by the time they need their service, and who live longest with them; whereas those who are born in old age seldom arrive at mature age before their parents die. Such children, when well educated, pious, and obedient, are like so many arrows in the hand of a mighty man, “ready winged with duty and love to fly to the mark; polished and keen to grace and maintain the cause of their parents, to defend them from hostile invasions, and instantly to repel every assailant.” Happy is he who hath his quiver full of them Whose house is as full of children as the quiver of a mighty man is of arrows. They These parents, who have such a numerous issue; shall not be ashamed, &c. Shall courageously plead their cause in courts of judicature, which were held at the gates of cities, not fearing to be crushed by the might of their adversaries, as weak and helpless persons frequently are. Or, as some understand the words, the children shall not be ashamed to plead for their parents in the gates, but will be ready at all times to appear for them, to answer any charge that may be brought against them and to vindicate them in their persons, their good name, or their property.