Anas bin Malik reported,

His grandmother Mulaykah invited the Messenger of Allah ﷺ to a meal she had prepared for him. He ate some of it and then said, "Get up, and I will lead you in prayer."Anas said, "I went to a straw mat of ours that had turned black from long use and sprinkled it with water. The Messenger of Allah ﷺ stood, and I lined up with the orphan behind him, and the elderly woman stood behind us. The Messenger of Allah ﷺ led us in two units of prayer and then departed."

Bukhari 380

Sahih

حدثنا عبد الله بن يوسف قال أخبرنا مالك عن إسحاق بن عبد الله بن أبي طلحة

عن أنس بن مالك

أن جدته مليكة دعت رسول الله ﷺ لطعام صنعته له فأكل منه ثم قال قوموا فلأصل لكم قال أنس فقمت إلى حصير لنا قد اسود من طول ما لبس فنضحته بماء فقام رسول الله ﷺ وصففت واليتيم وراءه والعجوز من ورائنا فصلى لنا رسول الله ﷺ ركعتين ثم انصرف

البخاري 380صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Prayer
Chapter
Prayer on a mat
Numbering
Darussalam 380
Bukhari 380