صحیح ابن حبان
Ibn Hibban
كتاب الصوم
Book of Fasting
فصل في صوم يوم الشك - ذكر خبر أوهم من لم يحكم صناعة الحديث أنه مضاد هذا الفعل المزجور عنه
Section on Fasting the Day of Doubt - A report that may mislead some into thinking it contradicts the discouraged act
1 hadith
Hadith 3587
Sayyiduna Imran bin Husain (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said to him, or perhaps to another person: Have you fasted any days from the end of this month? He replied: No. The Prophet (peace and blessings be upon him) said: When you do not fast (any voluntary fasts) in a month, then fast one or two days.