Narrated A'ishah (May Allah be pleased with her):The sun and the moon are not eclipsed on account of anyone's death or on account of anyone's birth. So when you see that, supplicate Allah, declare His greatness, and give alms.
حَدَّثَنَا الْقَعْنَبِيُّ، عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " الشَّمْسُ وَالْقَمَرُ لاَ يُخْسَفَانِ لِمَوْتِ أَحَدٍ وَلاَ لِحَيَاتِهِ فَإِذَا رَأَيْتُمْ ذَلِكَ فَادْعُوا اللَّهَ عَزَّ وَجَلَّ وَكَبِّرُوا وَتَصَدَّقُوا " .
AbuDaud
The Book Of The Prayer For Rain (Kitab al-Istisqa') • Hadith 1191