Musnad Ahmad 32:1910

'Affan narrated to us, Hammad ibn Salamah narrated to us, he said: Thabit informed us, from Anas, he said: Some people came to the Prophet, peace and blessings of Allah be upon him, and said: "Send with us men to teach us the Quran and the Sunnah." So he sent with them seventy men from the Ansar, who were called "the reciters" (al-Qurra'), among whom was my maternal uncle, Haram. They would recite the Quran and study it at night. During the day, they would bring water and place it in the mosque, and they would gather firewood and sell it, and with it, they would buy food for the people of the Suffah and the poor. The Prophet, peace and blessings of Allah be upon him, sent them, but [the enemies] intercepted them and killed them before they reached the place. They said: "O Allah, convey to our Prophet on our behalf that we have met You, so we are pleased with You, and You are pleased with us." He said: A man came to Haram, the maternal uncle of Anas, from behind him and pierced him with his spear until it went through him. He said: "I have succeeded, by the Lord of the Kaaba." The Messenger of Allah, peace and blessings of Allah be upon him, said to his companions: "Your brothers who were killed said to their Lord: 'Convey to our Prophet on our behalf that we have met You, so we are pleased with You, and You are pleased with us.'"