Sahih Muslim Book 4, Hadith Number 1994.

Chapter : Mention of the torment of grave in eclipse prayer.

‘Abdullah b. ‘Umar reported that the Messenger of Allah (may peace be upon him) observed: Verily the sun and the moon do not eclipse on account of the death or life of anyone. They are in fact the signs among the signs of Allah. So when you see them, observe prayer.