וַיִּקְרָ֣א רָ֭עָב עַל־הָאָ֑רֶץ כָּֽל־מַטֵּה־לֶ֥חֶם שָׁבָֽר׃
And He called a famine upon the land; He broke the whole staff of bread.
Rashi on Psalms
He called a famine in order to exile them to Egypt (I found).
וַיִּקְרָ֣א רָ֭עָב עַל־הָאָ֑רֶץ כָּֽל־מַטֵּה־לֶ֥חֶם שָׁבָֽר׃
And He called a famine upon the land; He broke the whole staff of bread.