مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1863
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn "Abbas said: The sun was eclipsed and the Messenger of Allah (ﷺ) and his Companions stood up (to pray). He recited a lengthy soorah, then he bowed. Then he raised his head and recited (some more), then he bowed, and he prostrated twice. Then he stood up and recited (Qur"an) and bowed, then he prostrated twice. Four bows and four prostrations in two rak"ahs.
Musnad Ahmad 1864Sahih hadeeth]