Qutayba bin Sa'id bin Jamil قتيبة بن سعيد بن جميل · The Book of Eclipses

The Messenger of Allah (ﷺ) prayed on the day the sun was eclipsed, bowing four times in two rak'ahs and prostrating four times.

"The Prophet (ﷺ) went out and the sun became eclipsed. We went out to the apartment and some women gathered around us. The Messenger of Allah (ﷺ) turned to us, and that was at the time of the forenoon. He stood for a long time, then he bowed for a long time, then he raised his head and stood for a shorter time than the first, then he bowed for a shorter time than the first, then he prostrated. Then…

"We were with the Prophet (ﷺ) and the sun became eclipsed. He got up and went to the masjid, dragging his garment in haste. The people stood with him and he prayed two rak'ahs as they usually prayed. When the eclipse ended he addressed us and said 'The sun and the moon are two of the signs of Allah (SWT), with which He strikes fear into His slaves. They do not become eclipsed for the death or birth of anyone.…