Musannaf Ibn Abi Shaybah

Hazrat Alaa bin Ziyad, regarding the prayer of lunar eclipse, says that the Imam will recite (Qira'at) in the standing position and then bow (Ruku). When he says "Sami' Allahu liman Hamidah," he should look towards the moon. If the moon has not become bright, he should recite again, then bow, then raise his head. When he says "Sami' Allahu liman Hamidah," he should look towards the moon; if it has not become bright, he should recite again, then bow, then raise his head. When he says "Sami' Allahu liman Hamidah," he should look towards the moon. If it has become bright, he should prostrate (Sajdah), then stand up and add another rak'ah with it. If the moon has not become bright, he should not prostrate until some part of the moon becomes bright. Then, if after that the eclipse happens again, he should not perform this prayer.