Verses with the word slipped in the Old Testament (2 verses):

1 Samuel 19:10
And Saul sought to smite David even to the wall with the javelin: but he slipped away out of Saul's presence, and he smote the javelin into the wall: and David fled, and escaped that night.

Psalms 73:2
But as for me, my feet were almost gone; my steps had well nigh slipped.