Muslim 2500 · Book 13
Sahih Muslim, 2500
The Book of Fasting
Sahih (authentic)by the collection
وَحَدَّثَنَا ابْنُ نُمَيْرٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا عُبَيْدُ اللَّهِ، بِهَذَا الإِسْنَادِ وَقَالَ " فَإِنْ غُمَّ عَلَيْكُمْ فَاقْدِرُوا ثَلاَثِينَ " . نَحْوَ حَدِيثِ أَبِي أُسَامَةَ .
This hadith is narrated on the authority of 'Ubaidullah with the same chain of transmitters, and he said:If (the sky) is cloudy for you, then calculate thirty days (for the month of Ramadan)Rapporté par Ubaidullah selon la même chaîne de transmetteurs : Il a dit : « Si le ciel est couvert pour vous, alors comptez trente jours (pour le mois de Ramadan). »Grades given by scholars
Sahih collection: its hadiths are held authentic by the compiler.
Source: fawazahmed0/hadith-api (public domain).