Kathir b. 'Abbas narrated on the authority of Ibn 'Abbas that the Messenger of Allah (ﷺ) observed four rak'ahs and four prostrations in two rak'ahs.
Sahih Muslim Book 10, Hadith 5
← Previous Hadith 'A'isha reported that there was a solar eclipse during the lifetime of the Messenger of Allah (way peace be upon him) and he sent the announcer (to summon them) for congregational prayer. The people gathered together and he pronounced takbir and he observed four rak'ahs, in the form of two rak'ahs (i. e. he observed two qiyams and two ruku's in one rak'ah) and four prostrations.

Sahih Muslim Book 10, Hadith 4 Next Hadith → Kathir b. Abbas used to narrate that Ibn 'Abbas used to relate about the prayer of the Messenger of Allah (ﷺ) in regard to the eclipse of the sun like that what was narrated by 'Urwa on the authority of 'A'isha.

Sahih Muslim Book 10, Hadith 6