that he entered upon Yahya bin Sa`id while one of Yahya's sons was aiming at a hen after tying it. Ibn
`Umar walked to it and untied it. Then he brought it and the boy and said. "Prevent your boys from
tying the birds for the sake of killing them, as I have heard the Prophet (ﷺ) forbidding the killing of an
animal or other living thing after tying them."
Sahih al-Bukhari Book 72, Hadith 40