Verses with the word slip in the Old Testament (4 verses):

2 Samuel 22:37
Thou hast enlarged my steps under me; so that my feet did not slip.

Job 12:5
He that is ready to slip with his feet is as a lamp despised in the thought of him that is at ease.

Psalms 17:5
Hold up my goings in thy paths, that my footsteps slip not.

Psalms 18:36
Thou hast enlarged my steps under me, that my feet did not slip.