John Gill, on Acts 13:11

And now behold the hand of the Lord is upon thee,.... That is, the power of God was just ready to be exerted on him in a way of punishment, by striking him with blindness: and thou shall be blind, not seeing the sun for a season: so blind as not to see the sun, when it shined ever so brightly: this punishment seems to be but for a time; and some say that Elymas repented, and had his sight restored to him; and after that he returned to his sorcery, and again greatly opposed Barnabas in the island of Cyprus: and immediately there fell on him a mist and darkness; as soon as ever the apostle had said the above words, a dark mist fell upon his eyes, which began the blindness, and issued in a total one: and he went about seeking some to lead him by the hand; he groped about the room, if he could find, and lay hold on some person to lead him: for he was quickly stone blind, so that he could not guide himself, as the men of Sodom were, when smitten with blindness by the angel; wherefore, though they groped about for the door of the house till they were weary, they could not find it, Gen 19:11 of which the Jews say, as here, that it was , "a stroke from God" (u). Blind men need one to hold them by the hand, and lead them, as Samson, Jdg 16:26 and Saul, Act 9:8. The striking this man with blindness is an instance of the power the apostles were endued with, for the punishing of offenders: so Ananias and Sapphira were struck dead for telling a lie: and the incestuous person was delivered to Satan to undergo a corporeal punishment for his incest; as Hymenaeus and Alexander were for their blasphemy, Act 5:5. (u) Tzeror Hammor, fol. 20. 3.