Musnad Ahmad 1244:9

'Abd al-Razzaq narrated to us, he said: Ma'mar narrated to us, from al-Zuhri, he said: Humayd ibn 'Abd al-Rahman ibn 'Awf narrated to me, from his mother, Umm Kulthum bint 'Uqbah—and she was among the first female emigrants—she said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "He is not a liar who reconciles between people, so he says something good or conveys something good." And he said once: "And conveys something good."