Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Hani (may Allah be pleased with him), he says: When I came to the Messenger of Allah (peace and blessings of Allah be upon him) with the delegation, I said: O Messenger of Allah! Which deed makes Paradise obligatory? He (peace and blessings of Allah be upon him) said: “Adhere to speaking good words and feeding (others).”