Alqamah narrates: I asked Umm al-Mu'mineen Sayyidah Aisha Siddiqa (may Allah be pleased with her): I said, O Umm al-Mu'mineen! How was the practice of the Prophet (peace and blessings of Allah be upon him)? Did he specify any particular day? She replied: Yes! The practice of the Prophet (peace and blessings of Allah be upon him) was regular, and who among you has the ability which the Prophet (peace and blessings of Allah be upon him) had?
Hadith Referenceصحیح ابن حبان / كتاب الصوم / 3647
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «صحيح أبي داود» (1240)، «مختصر الشمائل» (264): ق.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرط الشيخين