John Gills Exposition of the Bible Commentary - Lamentations 3:29
He putteth his mouth in the dust ,.... Of self-abhorrence; sensible of his own vileness and nothingness, his unworthiness, and the unprofitableness of all his duties; ascribing the whole of his salvation to the free grace of God, Job 42:6 ; humbling himself under the mighty hand of God; not daring to open his mouth in a complaining way against him; but prostrating himself before him to the earth, as the manner of the eastern people in prayer was, to which the allusion is; licking as it... read more
Matthew Henry's Complete Commentary - Lamentations 3:21-36
Here the clouds begin to disperse and the sky to clear up; the complaint was very melancholy in the former part of the chapter, and yet here the tune is altered and the mourners in Zion begin to look a little pleasant. But for hope, the heart would break. To save the heart from being quite broken, here is something called to mind, which gives ground for hope (Lam. 3:21), which refers to what comes after, not to what goes before. I make to return to my heart (so the margin words it); what we... read more