It is narrated from Aisha (may Allah be pleased with her) that she reported from the Prophet (ﷺ) that the sun was eclipsed, so the Messenger of Allah (ﷺ) performed prayer. She stated that his prayer consisted of two rak'ahs, and in each rak'ah there were two bowings (ruku).
Hadith Referenceمسند الإمام الشافعي / كتاب الكسوف / 551
Hadith Takhrijاخرجه البخارى الكسوف، باب التعوذ من عذاب القبر في الكسوف ، رقم : 1049، 1050 ۔ ومسلم، الكسوف، باب ذكر عذاب القبر في الكسوف، رقم: (903)۔