Musnad Ahmad Hadith 12788

It is narrated from Anas (may Allah be pleased with him) that Utban (may Allah be pleased with him) began to complain about his eyes. He sent a message to the Prophet (ﷺ), mentioning his difficulty, and requested, "O Messenger of Allah (ﷺ), please come to my house and offer prayer so that I may make that place my prayer area." So, one day the Prophet (ﷺ) went to his house along with some of his companions (may Allah be pleased with them). The Prophet (ﷺ) stood up to pray, and the companions (may Allah be pleased with them) began talking among themselves and started mentioning the troubles caused by the hypocrites. They considered Malik bin Dukhaythum to be the most involved in this. When the Prophet (ﷺ) finished the prayer, he said, "Does he not bear witness that there is no god but Allah and that I am the Messenger of Allah?" A man said, "Why not, but it is not from his heart." The Prophet (ﷺ) said, "Whoever bears witness that there is no god but Allah and that I am the Messenger of Allah, the fire of Hell is made forbidden for him."