Anas (may Allah be pleased with him) narrates: The Muhajirun and Ansar (may Allah be pleased with them) were digging the trench, carrying the earth, and saying: "We are those who have pledged allegiance to Muhammad (peace and blessings of Allah be upon him) for jihad as long as we live." In response, the Prophet (peace and blessings of Allah be upon him) was saying: "O Allah! True life is the life of the Hereafter, so forgive the Ansar and the Muhajirun." Agreed upon.