It is narrated from Sayyida Aisha (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) used to pay more attention to the crescent of Sha'ban than to the crescent of any other month. Then, when the crescent of Ramadan was sighted, he would begin fasting, and if the sky was cloudy, he would complete the count of thirty days of (Sha'ban), and then begin fasting.
Hadith Referenceالفتح الربانی / كتاب الصيام / 3687
Hadith Gradingمحدثین:صحیح
Hadith Takhrij«اسناده صحيح علي شرط مسلم۔ اخرجه ابوداود: 2325، (انظر مسند أحمد ترقيم الرسالة: 25161 ترقیم بيت الأفكار الدولية: 25676»