Riyad as-Salihin, Book 3, Hadith 733 (In-Book) ⓘ
'Aishah (May Allah be pleased with her) reported: Messenger of Allah was eating with his six Companions when a desert Arab came and ate up the food in two mouthfuls. Messenger of Allah said, "Had he mentioned the Name of Allah, it would have sufficed for all of you."[At-Tirmidhi].
وعن عائشة رضى الله عنها قالت: كان رسول الله صلى الله عليه وسلم يأكل طعاماً في ستة من أصحابه، فجاء أعرابى، فأكله بلقمتين. فقال رسول الله صلى الله عليه وسلم "أما إنه لو سمى لكفاكم" .