Sahih al-Bukhari 129
Book 3: Knowledge · Narrated by Anas
Arabic
حَدَّثَنَا مُسَدَّدٌ، قَالَ حَدَّثَنَا مُعْتَمِرٌ، قَالَ سَمِعْتُ أَبِي قَالَ، سَمِعْتُ أَنَسًا، قَالَ ذُكِرَ لِي أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ لِمُعَاذٍ " مَنْ لَقِيَ اللَّهَ لاَ يُشْرِكُ بِهِ شَيْئًا دَخَلَ الْجَنَّةَ ". قَالَ أَلاَ أُبَشِّرُ النَّاسَ قَالَ " لاَ، إِنِّي أَخَافُ أَنْ يَتَّكِلُوا ".
English translation
Narrated Anas:I was informed that the Prophet (ﷺ) had said to Mu`adh, "Whosoever will meet Allah without associating anything in worship with Him will go to Paradise." Mu`adh asked the Prophet, "Should I not inform the people of this good news?" The Prophet (ﷺ) replied, "No, I am afraid, lest they should depend upon it (absolutely)
Reference: Sahih al-Bukhari 129, Book of Knowledge. English translation by Dr. Muhammad Muhsin Khan.