Sahih al-Bukhari, Hadith 129 ⓘ

Narrated Anas: I was informed that the Prophet 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 replied, "No, I am afraid, lest they should depend upon it (absolutely).

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 ‏"‏‏.‏