بُلُوغُ الْمَرَامِ
Bulugh al-Maram 691
Fasting
وَعَنْ أَبِي هُرَيْرَةَ - رضى الله عنه - أَنَّ رَسُولَ اَللَّهِ - صلى الله عليه وسلم -قَالَ: { إِذَا اِنْتَصَفَ شَعْبَانَ فَلَا تَصُومُوا } رَوَاهُ اَلْخَمْسَةُ, وَاسْتَنْكَرَهُ أَحْمَدُ [1] .
Abu Hurairah (RAA) narrated that The Messenger of Allah (ﷺ) said: "When it is the middle of Sha'ban do not fast (until it is Ramadan).” Related by the five Imams, but Imam Ahmad declared it to be a weak narration.
Arabic/English book reference: Book 5, Hadith 711