The Messenger of Allah ﷺ came out from relieving himself, and food was brought to him. They said, "Shall we bring you water for ablution?"He replied, "I have only been commanded to perform ablution when I rise for prayer."
أخبرنا زياد بن أيوب قال حدثنا ابن علية قال حدثنا أيوب عن ابن أبي مليكة
أن رسول الله ﷺ خرج من الخلاء فقرب إليه طعام فقالوا ألا نأتيك بوضوء فقال إنما أمرت بالوضوء إذا قمت إلى الصلاة
Its isnad is sahih. Abu Dawud narrated it in the Book of Foods, chapter on washing the hands before eating, hadith 3760, and Tirmidhi in the Book of Foods, chapter on foregoing wudu before eating, hadith 1847, from the hadith of Ismail bin Ulaya, with the same chain. Tirmidhi said, hasan [sahih], and Ibn Khuzayma graded it sahih, hadith 35. It has another route in Muslim and elsewhere.Ibn Abu Mulayka's name was Abdullah.