Hazrat Anas bin Malik (may Allah be pleased with him) narrated that I was greatly grieved over those who were martyred at the place of Harrah. Hazrat Zaid bin Arqam (may Allah be pleased with him) came to know of my sorrow, so he wrote to me that he had heard from the Messenger of Allah (peace and blessings of Allah be upon him), who was saying: O Allah! Forgive the Ansar and also forgive their sons.