because of great servitude - that is, in a state “of great servitude,” endured from the Chaldeans. “Because” is made by Vatablus indicative of the cause of her captivity; namely, her having “afflicted” and unjustly brought into “servitude” the manumitted bond-servants (Jer 34:8-22). Maurer explains it, “Judah has left her land (not literally ‘gone into captivity’) because of the yoke imposed on it by Nebuchadnezzar.”
no rest - (Deu 28:64, Deu 28:65).
overtook her between ... straits - image from robbers, who in the East intercept travelers at the narrow passes in hilly regions.