John Gill Commentary Acts 3:7

"And he took him by the right hand, and raised him up: and immediately his feet and his ankle-bones received strength." — Acts 3:7 (ASV)

And he took him by the right hand
In imitation of Christ, whom he had often seen using the same action on such occasions:

and lifted him up ;
believing he was cured, and that it might be manifest. The word him is expressed in the Alexandrian copy, and in some others, and in the Oriental versions, which is a supplement in our translation:

and immediately his feet and ankle bones received strength ;
where, it seems, his lameness lay. The Vulgate Latin renders it, his bases and soles, which may include his legs and thighs, as well as feet; and the Syriac version, "his feet and soles"; and the Arabic version, "his soles, and the muscles adjoining to his heels"; and the Ethiopic version furthest off of all, "he was strengthened in his feet, and in his loins"; his disorder might be of the paralytic kind.