Psalms 139:13

“For thou hast possessed my reins, etc.] His thoughts and counsels, the reins being the seat of instruction and counsel; hence God is called the trier of the reins, and searcher of the hearts of the children of men; he is the possessor or master of their most secret thoughts, and thoroughly knows them; (see <190709>Psalm 7:9 16:7); they are also the seat of the affections, which are naturally sinful and inordinate, and set upon carnal and earthly things; but the Lord possesses and engrosses the affections of his people in the best sense, (<197325>Psalm 73:25); moreover the reins are the seat of lust, the bed in which it is conceived and brought forth, and God knows the first motions of it…”

“For thou hast possessed my reins - The word here rendered “possessed” means properly to “set upright,” to “erect,” and hence, the derivative of the verb is applied to a cane or reed, as being erect. Then the word means to found, to create, Genesis 14:19, Genesis 14:22 - as the heavens and the earth; and then, to get, to gain, to purchase, etc. Here the word seems to be used in its original sense, to make, create, etc. The idea is, not as in our translation, that God “possessed” or “owned” them but that he had “made” them, and that, “therefore,” he knew all about them. The word “reins” means literally the “kidneys;” and then, it comes to denote the inward part, the mind, the soul, the seat of…”

“139:13 The delicate, inner parts of the body include a person’s very being. • Even when hidden in his mother’s womb, the psalmist was guided by the Lord.”

“For thou: Job 10:9-12 covered me: Psa 22:9, Psa 22:10, Psa 71:6; Job 31:15; Isa 44:2, Isa 46:3; Jer 1:5 Psalms 139:14”

“The fact that man is manifest to God even to the very bottom of his nature, and in every place, is now confirmed from the origin of man. The development of the child in the womb was looked upon by the Israelitish Chokma as one of the greatest mysteries, Ecc 11:5; and here the poet praises this coming into being as a marvellous work of the omniscient and omnipresent omnipotence of God. קנה here signifies condere; and סכך not: to cover, protect, as in Psa 140:8; Job 40:22, prop. to cover with network, to hedge in, but: to plait, interweave, viz., with bones, sinews, and veins, like שׂכך in Job 10:11. The reins are made specially prominent in order to mark the, the seat of the tenderest, most…”