Hadith 687:12
Waki' narrated to us, Fitr narrated to us, from 'Abd al-Jabbar ibn Wa'il, from his father, who said: "I saw the Messenger of Allah, peace and blessings of Allah be upon him, raising his hands when he commenced the prayer, until his thumbs were level with his earlobes."
حدثنا وكيع، حدثنا فطر، عن عبد الجبار بن وائل، عن أبيه قال: " رأيت رسول الله صلى الله عليه وسلم يرفع يديه حين افتتح الصلاة، حتى حاذت إبهامه شحمة أذنيه "