*Minor differences ignored. Grouped by changes, with first version listed as example.
Thou hast beset me behind and before - The word rendered "beset" - צור tsûr - means properly to press; to press upon; to compress. It has reference commonly to the siege of a city, or to the pressing on of troops in war; and then it comes to mean to besiege, hem in, closely surround, so that there is no way of escape. This is the idea here - that God was on every side of him; that he could not escape in any direction. He was like a garrison besieged in a city so that there was no means of escape. There is a transition here (not an unnatural one), from the idea of the Omniscience of God to that of His Omnipresence, and the remarks which follow have a main reference to the latter.
And laid thine hand upon me - That is, If I try to escape in any direction I find thine band laid upon me there. Escape is impossible.
Thou hast beset me behind and before - אחור וקדם צרתני achor vekodam tsartani, "The hereafter and the past, thou hast formed me." I think Bishop Horsley's emendation here is just, uniting the two verses together. "Behold thou, O Jehovah, knowest the whole, the hereafter and the past. Thou hast formed me, and laid thy hand upon me."
Thou hast beset me behind and before, and laid thine (d) hand upon me.
(d) You so guide me with your hand, that I can turn no way, but where you appoint me.
Thou hast beset me behind and before,.... Art on every side of me, all around me, like one besieged in a strait place; so that there is nothing I can think, say, or do, but what is known unto thee. The two Kimchis, father and son, render the word, "thou hast formed me": and interpret it of the formation of his body, of which, in Psalm 139:14; see Job 10:8 but it denotes how God compasses men with his presence and providence, so that nothing escapes his knowledge;
and laid thine hand upon me; not his afflicting hand, which sometimes presses hard; though the Targum thus paraphrases it,
"and stirred against me the stroke of thine hand:''
but rather his hand of power and providence, to preserve, protect, and defend him. Or it signifies that he was so near to him that his hand was upon him, and he was perfectly known; as anything is that is before a man, and he has his hand upon.
Beset me - With thy all - seeing providence. And laid - Thou keepest me, as it were with a strong hand, in thy sight and under thy power.
*More commentary available at chapter level.