Psalms 3:5

“I laid me down and slept, etc.] After the battle was over between Absalom’s men and his, says Aben Ezra; but rather this was in the midst of his trouble and distress, since he afterwards prays for salvation: and this sleep was either, as Jarchi observes, through his heart being overwhelmed with grief; for there have been instances of persons sleeping through sorrow, as Elijah, Jonah, and the disciples of Christ, (<111904>1 Kings 19:4,5 Jon 1:3 <422245>Luke 22:45); or rather this is expressive of the calmness and serenity of his mind amidst his troubles; he laid himself down in peace, and slept quietly and comfortably; he did not lose a night’s rest, his sleep was sweet unto him; which was a…”

“the Lord sustained me--literally, "will sustain me," as if his language or thought when he laid down, and the reason of his composure.”

“I laid me down and slept - Notwithstanding these troubles and dangers I had such confidence that God hears prayer, and such calm trust in his protection, that I laid me down gently and slept securely. The psalmist mentions this as a remarkable proof of the divine protection and favor. He was driven from his capital, his throne, and his home. He was compelled to wander as a poor fugitive, accompanied by only a few friends. He was pursued by enemies, who were numbered by thousands. He was made an exile, and persecuted by his own son; and with this son there were men of age and of experience in war. The forces of his enemies might come upon him at any moment. In these circumstances, persecuted…”

“Slept - Securely, casting all my cares upon God. Awaked - After a sweet and undisturbed sleep. Psalms 3:7”

“3:5 By refocusing on the Lord (3:3-4) in the midst of his crisis, the psalmist can rest, confident of his safety (see study note on 4:8). The Lord cares for his servant; he protects him and keeps his mind and heart from fear (37:17; 54:4; 119:116; 145:14).”

“I laid: Psa 4:8, Psa 127:2; Lev 26:6; Job 11:18, Job 11:19; Pro 3:24; Act 12:6 the: Psa 4:8, Psa 66:9; Pro 14:26, Pro 18:10; Isa 26:3 Psalms 3:6”

“(Heb.: 3:6-7) That this God will protect him, His protection during the past night is now a pledge to him in the early morning. It is a violation of the rules of grammar to translate ואישׁנה: I shall go to sleep, or: I am going to sleep. The 1 pers. fut. consec. which is indicated by the ו, is fond of taking an ah of direction, which gives subjective intensity to the idea of sequence: "and thus I then fell asleep," cf. Psa 7:5; Psa 119:55, and frequently, Gen 32:6, and more especially so in the later style, Ezr 9:3; Neh 13:21, vid., Ges. 49, 2, Bttcher, Neue Aehrenlese, No. 412. It is a retrospective glance at the past night. Awaking in health and safety, he feels grateful to Him to whom he…”