Did God give Gehazi (Elisha's servant) leprosy?
Elisha told Gehazi that God would give him (and all of his "seed") leprosy forever.
The leprosy therefore of Naaman shall cleave unto thee, and unto thy seed for ever.
And he went out from his presence a leper as white as snow. 2 Kings 5:27
Yet later Gehazi is talking to the king praising Elisha. (If Naaman had leprosy he wouldn't be allowed in the king's presence, and he wouldn't be
praising the one who gave him the disease.)
And the king talked with Gehazi the servant of the man of God, saying, Tell me, I pray thee,
all the great things that Elisha hath done. 2 Kings 8:4