Yonus bin Yazid bin Abi al-Nijad يونس بن يزيد بن أبي النجاد · The Book of Eclipses

The Messenger of Allah (ﷺ) prayed when the sun was eclipsed, bowing eight times and prostrating four times.

"There was an eclipse of the sun and at the time we were with the Messenger of Allah (ﷺ) in Al-Madinah. He rushed out dragging his garment and prayed two rak'ahs, which he made lengthy. The end of his prayer coincided with the end of the eclipse. He praised and glorified Allah (SWT), then he said: 'The sun and the moon are two of the signs of Allah (SWT), and they do not become eclipsed for the death or birth…

"There was an eclipse of the sun and the Messenger of Allah (ﷺ) ordered a man to call out: As-salatu jami'ah (prayer is about to begin in congregation). The people gathered and the Messenger of Allah (ﷺ) led them in prayer. He said the takbir, then he recited at length. Then he said the takbir and bowed for a long time, as long as he had recited or longer. Then he raised his head and said: Sami Allahu liman hamidah…