Musannaf Ibn Abi Shaybah 30510 — Cauterizing a thief's hand

Amr bin Abi Sufyan said that a thief was brought to Sayyiduna Ibn al-Zubayr (may Allah be pleased with him), and he cut off his hand. At that, Aban bin Uthman said to him: "Cauterize him." He said: "You are very merciful toward him." He said: "No, but this practice is the Sunnah."