Musnad Ahmad 1119:40

Husayn narrated to us, in the interpretation of Shayban, from Qatadah, who said: A companion of ours narrated to us—I think he is Abu al-Malih al-Hudhali—from Awf ibn Malik, and he mentioned it, and he said: "Between that half of my nation enters Paradise." The end of the hadith of Awf ibn Malik al-Ansari. And it is the completion of the Musnad of the Ansar, may Allah be pleased with them.