Psalms 39:9

“I was dumb, I opened not my mouth, etc.] This refers either to his former silence, before he broke it, (<193901>Psalm 39:1,2), or to what he after that came into again, when he had seen the folly of his impatience, the frailty of his life, the vanity of man, and all human affairs, and had been directed to place his hope and confidence in the Lord, (<193905>Psalm 39:5-7); or to the present frame of his mind, and his future conduct, he had resolved upon; and may be rendered, “I am dumb”; or “will be dumb, and will not open my mouth” f559; that is, not in a complaining and murmuring way against the Lord, but be still, and know or own that he is God; because thou didst [it]; not “because thou…”

“I was dumb - See the notes at Psalms 39:2. Compare Isaiah 53:7. The meaning here is, that he did not open his mouth to complain; he did not speak of God as if he had dealt unkindly or unjustly with him. I opened not my mouth - I kept entire silence. This would be better rendered, “I am dumb; I will not open my mouth.” The meaning is, not that he had been formerly silent and uncomplaining, but that he was now silenced, or that his mind was now calm, and that he acquiesced in the dealings of Divine Providence. The state of mind here, if should be further observed, is not that which is described in Psalms 39:2. There he represents himself as mute, or as restraining himself from uttering what…”

“39:9-11 The psalmist links suffering with God’s discipline, assuming that it is punishment for his sin.”

“Psa 38:13; Lev 10:3; Sa1 3:18; Sa2 16:10; Job 1:21, Job 2:10, Job 40:4, Job 40:5; Dan 4:35 Psalms 39:10”