Musnad Ahmad 907:173

Waki’ narrated to us, from al-Mas’udi, from Simak, from Jabir ibn Samurah, who said: Ma’iz ibn Malik came to the Prophet, may Allah bless him and grant him peace, and confessed adultery before him. He said: So he turned his face away. He said: Then he came to us and confessed repeatedly, so he ordered him to be stoned, and he was stoned. Then he was approached and informed [of the people's reaction], so he stood up, praised Allah the Exalted, and extolled Him. He said: "What is the matter with men? Whenever we set out in the way of Allah, one of them stays behind with them, having a bleating like the bleating of a he-goat, offering one of them a small amount of milk. If Allah gives me power over them, I will surely make them an example."