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 ﷺ قَالَ لِمُعَاذٍ " مَنْ لَقِيَ اللَّهَ لاَ يُشْرِكُ بِهِ شَيْئًا دَخَلَ الْجَنَّةَ ". قَالَ أَلاَ أُبَشِّرُ النَّاسَ قَالَ " لاَ، إِنِّي أَخَافُ أَنْ يَتَّكِلُوا ".