Sahih Muslim
The Book of Prayers (Kitab Al-Salat)
Book Number: 004 / Hadith Number: 1985
Ibn 'Abbas reported: The Apostle of Allah (may peace be upon him) observed prayer while it was (solar) eclipse. He recited (the Qur'an in qiyam) and then bowed. He again recited and again bowed. He again recited and again bowed and again recited and again bowed, and then prostrated; and the second (rak'ah) was like this.