Matthew Poole and continuators on Lamentations 3:29

29 He putteth his mouth in the dust, if so be there may be hope .

If that may be supplied, or when (as Pagnine translateth [non-Latin text not transcribed] ver. 28. the connexion of these words with the former is very fair and easie, for then those words, ver. 27. It is good that must be repeated in the beginning of ver. 28. and 29. however both th s and the former Verses let us know the duty of persons under afflictions in order to their obtaining Mercy at the hand of God, and admirably give us the Character of Persons under afflictions preparing for Mercy. They hope, and quietly wait for Gods Salvation, ver. 26. they bear Gods yoke, ver. 27. because he hath laid it upon them. They sit alone and keep silence, ver. 28. and here they put their mouthes in the dust, that is, humble themselves to the feet of God, and to the Will of God; not being too confident of deliverances in this life, but if peradventure there may be hope.