It is narrated from Hazrat Anas (may Allah be pleased with him) that the Ansar used to say, "We are the ones who pledged allegiance to Muhammad (peace be upon him) for jihad as long as we are alive." And the Prophet (peace be upon him) used to reply, "O Allah! The good of the Hereafter is the real good, so forgive the Ansar and the Muhajireen."