Musnad Ahmad 33:906

Ya'qub narrated to us, he said: I heard him mention—meaning his father—from Muhammad ibn 'Ikrimah, from Ibrahim ibn 'Abd al-Rahman ibn 'Abd Allah ibn Abi Rabi'ah, and from Hasan ibn Muhammad ibn 'Ali ibn Abi Talib, that they both entered upon Jabir ibn 'Abd Allah al-Sulami while he was praying, wrapped in his garment, and his cloak was upon the walls of his mosque, and he prayed. Then he turned to us and said to us: "I only prayed [this way] so that you might see me; I saw the Messenger of Allah (may Allah bless him and grant him peace) praying like this."