Power Man and Iron Fist #95 (July 1983) by Marvel Comics
"Members of the Wedding!" Guest-starring the Daughters of the Dragon. Story by Kurt Busiek. Art by Ernie Chan and Janice Chiang. Danny Rand comes into contact with a giant gem that causes his Iron Fist to react in a way he is not used to. Could this gem have something to do with Shao-Lao the Undying, the dragon Danny received his special abilities from?