Whenever Ibn Umar greeted Ibn Jafar, he would say, "Peace be upon you, son of the one with two wings."
أن ابن عمر كان إذا سلم على ابن جعفر قال: السلام عليك يا ابن ذي الجناحين.
Bukhari narrated it in Fadail al-Sahabah (3709) from Amr bin Ali, who said, Yazid bin Harun narrated to us, Ismail bin Abu Khalid informed us, from Shaybi, and he mentioned it.