حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ عَائِشَةَ، زَوْجَ النَّبِيِّ صلى الله عليه وسلم قَالَتْ فِي الْمَرْأَةِ الْحَامِلِ تَرَى الدَّمَ أَنَّهَا تَدَعُ الصَّلاَةَ ‏.‏

Yahya related to me from Malik that he had heard that A'isha, thewife of the Prophet, may Allah bless him and grant him peace, saidthat a pregnant woman who noticed bleeding left off from prayer. Translation Not Available

Book Ref: Muwatta Imam Malik Book 2 Hadith 131
Web Ref:  Muwatta Imam Malik Book 2 Hadith 102