Tirmidhi 689

Grading, its isnad is sahih. Abu Dawud narrated it in the Book of Fasting, chapter "A Month May Be Twenty-Nine Days," no. 2322, from Ahmad bin Mani with the same chain, and Ibn Khuzayma graded it sahih, no. 1922.Also on this topic there is a narration from Umar, perhaps referring to the hadith of Bukhari, no. 1954, and Muslim, no. 1100, and from Abu Hurairah [previously mentioned, no. 684], and Ayesha [Muslim, no. 1083], and Saad bin Abu Waqqas [Muslim, no. 1086], and Ibn Abbas [Muslim, no. 1088], and Ibn Umar [Bukhari, no. 1913, and Muslim, no. 1080], and Anas [coming, no. 690], and Jabir [Muslim, no. 1084], and Umm Salama [Bukhari, no. 5202, and Muslim, no. 1085], and Abu Bakra [coming, no. 692].