It is narrated from Sayyiduna Abu Qatadah (may Allah be pleased with him) that he heard the Prophet (peace and blessings of Allah be upon him) say: "When any one of you urinates, he should not touch his private part with his right hand, nor should he clean himself with his right hand, and he should not breathe into the vessel (while drinking)." This is the narration of Amr bin Abi Salamah, and Ali bin Hujr has said «‏‏‏‏عن عن» ‏‏‏‏ throughout the entire chain. (That is, he has not used the word «‏‏‏‏حدثنا» ‏‏‏‏ or «‏‏‏‏سمع» ‏‏‏‏ anywhere.)