Sayyiduna Jariyah bin Wahb al-Khuza'i (may Allah be pleased with him) narrates that Hafsah (may Allah be pleased with her) told me that the Messenger of Allah (peace and blessings be upon him) used his right hand for eating, drinking and putting on clothes, and his left hand for other tasks.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19650
It is narrated from Sayyidah Hafsah (may Allah be pleased with her) that when the Messenger of Allah (peace and blessings be upon him) lay down on his bed, he would place his right hand under his right cheek; and his (peace and blessings be upon him) right hand was for eating, drinking, purification and water, and his left hand was for other tasks.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19651