Psalms 31:5 - Coke's Commentary on the Holy Bible

Into thine hand, &c.— i.e. "To thy care and custody I commit my life, or my breath, as the word רוח ruach, signifies, as well as the spirit or soul; and the breath, being the sign of life, may here be taken for life itself." But our Saviour used these words, when expiring on the cross, in a more proper and literal sense than they can be applied to David. See Luke 23:46. He used them, says St. Augustin, to let us see that he is the person speaking in this psalm: most probably, with a design to convince the Jews, that, though suffering, he was the Messiah, and that son of David who should sit on his throne for ever. Mudge renders the lost clause, "Thou hast purchased me, O Lord God of truth; i.e. I am thy own property. I have been thine from the womb, and destined to thy service."