Albert Barnes Commentary Jeremiah 2:27

"who say to a stock, Thou art my father; and to a stone, Thou hast brought me forth: for they have turned their back unto me, and not their face; but in the time of their trouble they will say, Arise, and save us." — Jeremiah 2:27 (ASV)

“Stone” being feminine in Hebrew is here represented as the mother.

Arise, and save us - Whether it be idolatry or infidelity, it satisfies only in tranquil and prosperous times. No sooner does trouble come, than the deep conviction of the existence of a God, which is the witness for Him in our heart, resumes its authority, and man prays.