Sahih al-Bukhari 7368

Arabic

حَدَّثَنَا أَبُو مَعْمَرٍ، حَدَّثَنَا عَبْدُ الْوَارِثِ، عَنِ الْحُسَيْنِ، عَنِ ابْنِ بُرَيْدَةَ، حَدَّثَنِي عَبْدُ اللَّهِ الْمُزَنِيُّ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏ "‏ صَلُّوا قَبْلَ صَلاَةِ الْمَغْرِبِ ـ قَالَ فِي الثَّالِثَةِ ـ لِمَنْ شَاءَ ‏"‏‏.‏ كَرَاهِيَةَ أَنْ يَتَّخِذَهَا النَّاسُ سُنَّةً‏.‏

English translation

Narrated `Abdullah Al Muzam:The Prophet (ﷺ) said, "Perform (an optional) prayer before Maghrib prayer." (He repeated it thrice) and the third time he said, "Whoever wants to offer it can do so," lest the people should take it as a Sunna (tradition). (See Hadith No. 277, Vol)

Reference: Sahih al-Bukhari 7368, Book of Holding Fast to the Qur'an and Sunnah. English translation by Dr. Muhammad Muhsin Khan.