Khalid bin Ma'dan says that once we were present at the invitation of Abdul A'la bin Bilal. After finishing the meal, Hazrat Abu Umamah (may Allah be pleased with him) stood up and said, "I have stood here, but I am neither a preacher nor have I stood up with the intention of giving a speech. However, I heard the Prophet Muhammad (peace and blessings be upon him) recite this supplication after finishing the meal: 'Alhamdulillah katheeran tayyiban mubaarakan feehi ghayra makfiyyin wa laa muwadda'in wa laa mustaghna anhu.' Khalid says that Hazrat Abu Umamah (may Allah be pleased with him) repeated these words so many times that we memorized them."