Muwatta Malik, Book 16, Hadith 552 (In-Book)

Yahya related to me from Malik from Yahya ibn Said that A'isha, the wife of the Prophet, may Allah bless him and grant him peace, said, "I saw three moons fall into my room, and I related my vision to Abu Bakr as-Siddiq. Then, when the Messenger of Allah died, may Allah bless him and grant him peace, and was buried in my house, Abu Bakr said to me, 'This is one of your moons, and he is the best of them.' "

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، أَنَّ عَائِشَةَ، زَوْجَ النَّبِيِّ صلى الله عليه وسلم قَالَتْ رَأَيْتُ ثَلاَثَةَ أَقْمَارٍ سَقَطْنَ فِي حُجْرَتِي فَقَصَصْتُ رُؤْيَاىَ عَلَى أَبِي بَكْرٍ الصِّدِّيقِ قَالَتْ فَلَمَّا تُوُفِّيَ رَسُولُ اللَّهِ صلى الله عليه وسلم وَدُفِنَ فِي بَيْتِهَا قَالَ لَهَا أَبُو بَكْرٍ هَذَا أَحَدُ أَقْمَارِكِ وَهُوَ خَيْرُهَا ‏.‏

sunnah.com

also referenced under: Book 16, Hadith 30 (USC-MSA)