It is narrated from Hazrat Abu Bakrah (may Allah be pleased with him) that once, in the presence of the Prophet (peace and blessings be upon him), people were mentioning a man. One person said, "O Messenger of Allah, after you, in such and such deeds, no one seems superior to this person." The Prophet (peace and blessings be upon him) said, "Alas, you have broken your companion's neck." He repeated this sentence several times and said, "If any of you must praise his brother, then he should say it like this: 'I think that such and such a man appears to be so and so, and I do not declare anyone pure before Allah, and his true guardian is Allah; I consider him to be such and such.'"