Musnad Ahmad 28:568

Hisham ibn Sa'id narrated to us, Mu'awiyah ibn Sallam informed us, from Yahya ibn Abi Kathir, Abu Salamah ibn 'Abd al-Rahman informed me, regarding the report of 'Abdullah ibn 'Amr ibn al-'As, that when the sun eclipsed during the time of the Messenger of Allah (may Allah bless him and grant him peace), it was called out: "The prayer is gathering." The Messenger of Allah (may Allah bless him and grant him peace) bowed for two rak'ahs in one prostration, then the sun cleared. 'Aishah, the Mother of the Believers, said: "I have never prostrated a prostration longer than it, nor have I bowed a bowing that was longer than it."