Musnad Abu Ya'la al-Mawsili 150:273

Masruq ibn al-Marzuban narrated to us, Ibn Abi Za'idah narrated to us, Muhammad ibn Ishaq narrated to me, from Yahya ibn 'Abbad, from his father, from 'Aishah, who said: The Prophet, may Allah bless him and grant him peace, entered, and there covered him from Allah that which used to cover him. He was covered with his garment, and a pillow made of tanned leather was placed under his head. Then he sat up, and there was flowing from him [sweat] like pearls, and he was wiping it from himself.