Hadith 908
Chapter 4: Those Who Say That He Prayed With Eight Bowings And Four Prostrations - كتاب الكسوف
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا إِسْمَاعِيلُ ابْنُ عُلَيَّةَ، عَنْ سُفْيَانَ، عَنْ حَبِيبٍ، عَنْ طَاوُسٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ صَلَّى رَسُولُ اللَّهِ صلى الله عليه وسلم حِينَ كَسَفَتِ الشَّمْسُ ثَمَانَ رَكَعَاتٍ فِي أَرْبَعِ سَجَدَاتٍ . وَعَنْ عَلِيٍّ مِثْلُ ذَلِكَ .
Ibn 'Abbas reported:
When there was a solar eclipse the Messenger of Allah (way peace be upon him) observed eight ruku's and four prostrations (in two rak'ahs). This has been narrated by 'Ali also.
Reference : Sahih Muslim 908
In-book reference : Book 10, Hadith 20
USC-MSA web (English) reference : Book 4, Hadith 1984