Psalm 95:8-11

Harden not your heart, As in the provocation, and as in the day of temptation in the wilderness: When your fathers tempted me, Proved me, and saw my work. Forty years long was I grieved with this generation, And said, It is a people that do err in their heart, and they have not known my ways: Unto whom I sware in my wrath That they should not enter into my rest.