حَدَّثَنَا الْعَبَّاسُ بْنُ الْوَلِيدِ الدِّمَشْقِيُّ، حَدَّثَنَا مَرْوَانُ بْنُ مُحَمَّدٍ، حَدَّثَنَا الْهَيْثَمُ بْنُ حُمَيْدٍ، حَدَّثَنَا الْعَلاَءُ بْنُ الْحَارِثِ، عَنِ الْقَاسِمِ أَبِي عَبْدِ الرَّحْمَنِ، أَنَّهُ سَمِعَ مُعَاوِيَةَ بْنَ أَبِي سُفْيَانَ، عَلَى الْمِنْبَرِ يَقُولُ كَانَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ يَقُولُ عَلَى الْمِنْبَرِ قَبْلَ شَهْرِ رَمَضَانَ " الصِّيَامُ يَوْمَ كَذَا وَكَذَا وَنَحْنُ مُتَقَدِّمُونَ فَمَنْ شَاءَ فَلْيَتَقَدَّمْ وَمَنْ شَاءَ فَلْيَتَأَخَّرْ " .
It wasnarrated from Qasim Abu ‘Abdur-Rahman that he heard Mu’awiyahbinAbu Sufyan on the pulpit saying: “The Messenger of Allah (PBUH)usedto say from the pulpit, before the month of Ramadan: ‘Fastingwillbegin on such and such a day, but we are going to start fastingearlier, so whoever wants to start fasting earlier (i.e., inSha’ban),let him do so, and whoever wants to wait until Ramadanbegins, let himdo so.’” Translation Not Available
Book Ref: Sunan Ibn Majah Book 7 Hadith 1647
Web Ref: Sunan Ibn Majah Vol 1 Book 7 Hadith 1647