Hmam bin Yahya bin Dinar همام بن يحيى بن دينار · Sacrifice (Kitab Al-Dahaya)

The Messenger of Allah (ﷺ) said: Two sheep which resemble each other are to be sacrificed for a boy and one for a girl. Abu Dawud said: This is a sound tradition, and the tradition narrated by Sufyan is misunderstanding.