Hazrat Abdur Rahman bin Abi Bakrah narrates that his father, Hazrat Abu Bakrah, said: Someone praised a person in the presence of the Messenger of Allah, peace and blessings be upon him. Upon this, the Noble Prophet, peace and blessings be upon him, said several times to the one who praised, "Woe to you, you have cut your companion's neck." Then he, peace and blessings be upon him, said: "If any of you must praise his brother, there is no harm, but he should say: 'I think so-and-so is such, and I do not declare anyone pure before Allah.'"