Musnad Abu Ya'la al-Mawsili 147:46

Abu Bakr ibn Abi Shaybah narrated to us, Ibn ‘Ulayyah narrated to us, from Ibn ‘Awn, from Anas ibn Sirin, from ‘Abd al-Hamid ibn al-Mundhir ibn al-Walid ibn al-Jarud, from Anas ibn Malik, who said: Some of my paternal uncles prepared food for the Prophet, may Allah bless him and grant him peace, and he said: "I would like for him to eat in my house and pray." He said: So he came to him, and in the house was a mat from those mats. He ordered a side of it to be swept and sprinkled [with water], so he prayed, and we prayed with him.