Devarim 32:37

ואמר AND HE, the Omnipresent, WILL SAY with regard to them אי אלהימו WHERE ARE THEIR GODS which they served. צור חסיו בו THE ROCK IN WHOM THEY TRUSTED — i.e. the rock beneath which they sought shelter (more lit., with which they covered themselves) from the heat and the cold; that is to say, “in which they trusted” that it would protect them against evil.

וְאָמַ֖ר אֵ֣י אֱלֹהֵ֑ימוֹ צ֖וּר חָסָ֥יוּ בֽוֹ׃        

And he shall say, Where are their gods, their rock in whom they trusted,