Jamieson, Fausset and Brown on Lamentations 3:34-36

34-36. This triplet has an infinitive in the beginning of each verse, the governing finite verb being in the end of La 3:36, "the Lord approveth not," which is to be repeated in each verse. Jeremiah here anticipates and answers the objections which the Jews might start, that it was by His connivance they were "crushed under the feet" of those who "turned aside the right of a man." God approves (literally, "seeth," Ha 1:13; so "behold," "look on," that is, look on with approval) not of such unrighteous acts; and so the Jews may look for deliverance and the punishment of their foes.