It is narrated from Hazrat Bara bin Azib (may Allah be pleased with him) that the Holy Prophet (peace and blessings of Allah be upon him) mentioned the torment of the grave and said: When a person is questioned in the grave, "Who is your Lord?" and he replies, "My Lord is Allah and my Prophet is Muhammad (peace and blessings of Allah be upon him)," then this is the meaning of the verse that Allah Almighty keeps the believers firm on the "firm word" in this world and in the Hereafter.