But what would make you perceive, [O Muhammad], that perhaps he might be purified
Tafseer
{ وما يُدريك } يعلمك { لعله يزكى } فيه إدغام التاء في الأصل في الزاي، أي يتطهر من الذنوب بما يسمع منك.
{And what would make you know?} He would teach you. {Perhaps he will be purified.} In it, the ta’ in the original is assimilated into the zay, meaning he will be purified from sins by what he hears from you.