Eclipses.

Bukhari :: Book 2 :: Volume 18 :: Hadith 166

Narrated 'Aisha:

In the lifetime of the Prophet the sun eclipsed and the Prophet (p.b.u.h) stood up to offer the prayer with the people and recited a long recitation, then he performed a prolonged bowing, and then lifted his head and recited a prolonged recitation which was shorter than the first. Then he performed a prolonged bowing which was shorter than the first and then lifted his head and performed two prostrations. He then stood up for the second Raka and offered it like the first. Then he stood up and said, "The sun and the moon do not eclipse because of someone's life or death but they are two signs amongst the signs of Allah which He shows to His worshipers. So whenever you see them, make haste for the prayer."

Bukhari :: Book 2 :: Volume 18 :: Hadith 167

Narrated Abu Musa:

The sun eclipsed and the Prophet got up, being afraid that it might be the Hour (i.e. Day of Judgment). He went to the Mosque and offered the prayer with the longest Qiyam, bowing and prostration that I had ever seen him doing. Then he said, "These signs which Allah sends do not occur because of the life or death of somebody, but Allah makes His worshipers afraid by them. So when you see anything thereof, proceed to remember Allah, invoke Him and ask for His forgiveness."

Bukhari :: Book 2 :: Volume 18 :: Hadith 167

Narrated Abu Musa:

The sun eclipsed and the Prophet got up, being afraid that it might be the Hour (i.e. Day of Judgment). He went to the Mosque and offered the prayer with the longest Qiyam, bowing and prostration that I had ever seen him doing. Then he said, "These signs which Allah sends do not occur because of the life or death of somebody, but Allah makes His worshipers afraid by them. So when you see anything thereof, proceed to remember Allah, invoke Him and ask for His forgiveness."