Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) made three bequests: "Expel the polytheists from the Arabian Peninsula and treat the delegations as I do." Ibn Abbas (may Allah be pleased with them both) said: The Prophet (peace and blessings be upon him) remained silent about the third thing, or he said: "But I was made to forget it."