Full Sharh — Riyad as-Salihin 568

English Translation

'Aishah (May Allah be pleased with her) reported:: The Prophet (ﷺ) did not observe voluntary Saum (fasting) so frequently during any other month as he did during Sha'ban. He observed Saum throughout the month of Sha'ban.Another narration is: He (ﷺ) observed Saum during the whole month of Sha'ban except a few days..