Muwatta Malik, Book 49, Hadith 1679 (In-Book) ⓘ

Yahya related to me from Malik from Ibn Shihab from Abu Bakr ibn Ubaydullah ibn Abdullah ibn Umar from Abdullah ibn Umar that the Messenger of Allah, may Allah bless him and grant him peace, said, "When you eat, eat with your right hand and drink with your right hand. Shaytan eats with his left hand and drinks with his left hand."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ أَبِي بَكْرِ بْنِ عُبَيْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ بْنِ عُمَرَ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏ "‏ إِذَا أَكَلَ أَحَدُكُمْ فَلْيَأْكُلْ بِيَمِينِهِ وَلْيَشْرَبْ بِيَمِينِهِ فَإِنَّ الشَّيْطَانَ يَأْكُلُ بِشِمَالِهِ وَيَشْرَبُ بِشِمَالِهِ ‏" ‏ ‏.‏