CHAPTER: Disapproval Of Touching One’s Private Part With The Right Hand While Purifying.
Narrated Abu Qatadah: The Prophet صلی اللہ علیہ وسلم said: When any one of you urinates, he must not touch his penis with his right hand, and when he goes to relieve himself he must not wipe himself with his right hand (in the privy), and when he drinks, he must not drink in one breath.
Narrated Hafsah, Ummul Muminin: The Prophet صلی اللہ علیہ وسلم used his right hand for taking his food and drink and used his left hand for other purposes.
Narrated Aishah, Ummul Muminin: The Prophet صلی اللہ علیہ وسلم used his right hand for getting water for ablution and taking food, and his left hand for his evacuation and for anything repugnant.
Aishah, also reported a tradition bearing similar meaning through another chain of transmitters