Sahih al-Bukhari 7282
Sahih al-Bukhari · Book 96: Holding Fast to the Qur'an and Sunnah · Following the Sunna of the Prophet (saws)
Narrated Hammam:
حَدَّثَنَا أَبُو نُعَيْمٍ ، حَدَّثَنَا سُفْيَانُ ، عَنِ الأَعْمَشِ ، عَنْ إِبْرَاهِيمَ ، عَنْ هَمَّامٍ ، عَنْ حُذَيْفَةَ ، قَالَ يَا مَعْشَرَ الْقُرَّاءِ اسْتَقِيمُوا فَقَدْ سُبِقْتُمْ سَبْقًا بَعِيدًا فَإِنْ أَخَذْتُمْ يَمِينًا وَشِمَالاً، لَقَدْ ضَلَلْتُمْ ضَلاَلاً بَعِيدًا.
Hudhaifa said, "O the Group of Al-Qurra! Follow the straight path, for then you have taken a great lead (and will be the leaders), but if you divert right or left, then you will go astray far away."