Musnad Ahmad 27:1176

'Abd al-Razzaq narrated to us, Ma'mar informed us, from al-Zuhri, from Salim, from Ibn 'Umar, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Let no one of you make his brother stand up, then sit in his place." Salim said: So a man would stand up for Ibn 'Umar from his place, but he would not sit in his place.