תהילים יח:לז פירוש: רש״י

You have enlarged my step[s] beneath me One who widens his steps does not fall easily. Similarly, Scripture states (in Prov. 4:12): “When you walk, your steps will not be hampered (יצר) .”

slipped Heb. מעדו aluverjert in Old French, to slip.

my ankles Heb. קרסלי. They are the feet from the ankle which is called keville (cheville) in Old Frenchand below [to the heel].