תַּרְחִ֣יב צַעֲדִ֣י תַחְתָּ֑י וְלֹ֥א מָ֝עֲד֗וּ קַרְסֻלָּֽי׃
Thou hast enlarged my steps under me, and my feet have not slipped.
Rashi on Psalms
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) .”
Rashi on Psalms
my ankles Heb. קרסלי. They are the feet from the ankle which is called keville (cheville) in Old Frenchand below [to the heel].