وَعَنْ عَائِشَةَ رَضِيَ اَللَّهُ عَنْهَا قَالَتْ: { إِنَّمَا اَلْأَقْرَاءُ; اَلْأَطْهَارُ } .‏ أَخْرَجَهُ مَالِكٌ فِي قِصَّةٍ بِسَنَدٍ صَحِيحٍ 1‏ .‏‏1 ‏- صحيح.‏ رواه مالك في "الموطأ" (2 /576 ‏- 577 /54)‏.‏
Translation
Narrated 'Aishah (RA)

al-Aqra' is the period of a woman's purity (which occurs between two menses).[Malik, Ahmad and an-Nasa'i reported it in the course of a story with a Sahih (authentic) chain of narrators].