King James Version (KJV)
Harden not your heart, as in the provocation, and as in the day of temptation in the wilderness:
Modern English
do not harden your hearts, as at Meribah, as on the day at Massah in the wilderness,
Hebrew
אַל תַּקְשׁ֣וּ לְ֭בַבְכֶם כִּמְרִיבָ֑ה כְּי֥וֹם מַ֝סָּ֗ה בַּמִּדְבָּֽר׃
ʾal taqshv lbabkem kimriybah kyvom masah bamidbar