Musnad Abu Ya'la al-Mawsili 109:138

Ishaq narrated to us, Bishr bin al-Mufaddal narrated to us, Ammar bin Ghaziyyah narrated to us, a man from my people narrated to us, from Jabir, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever is given a gift and finds [the means], let him recompense it. If he does not find [the means], let him praise it. Whoever praises it has thanked him, and whoever conceals it has been ungrateful. Whoever adorns himself with what he has not been given is like one who wears two garments of falsehood." He pointed with his fingers like this—the index and the middle [fingers].