Tirmidhi Book 36, Hadith 2316

حَدَّثَنَا سُلَيْمَانُ بْنُ عَبْدِ الْجَبَّارِ الْبَغْدَادِيُّ، حَدَّثَنَا عُمَرُ بْنُ حَفْصِ بْنِ غِيَاثٍ، حَدَّثَنَا أَبِي، عَنْ الْأَعْمَشِ، عَنْ أَنَسٍ بْنِ مَالِكٍ، قَالَ:‏‏‏‏ تُوُفِّيَ رَجُلٌ مِنْ أَصْحَابِهِ، ‏‏‏‏‏‏فَقَالَ يَعْنِي رَجُلًا:‏‏‏‏ أَبْشِرْ بِالْجَنَّةِ، ‏‏‏‏‏‏فَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ:‏‏‏‏ أَوَلَا تَدْرِي فَلَعَلَّهُ تَكَلَّمَ فِيمَا لَا يَعْنِيهِ، ‏‏‏‏‏‏أَوْ بَخِلَ بِمَا لَا يَنْقُصُهُ ، ‏‏‏‏‏‏قَالَ:‏‏‏‏ هَذَا حَدِيثٌ غَرِيبٌ.

Anas bin Malik narrated that a man among his companions was dying so he said- meaning a man said to him: Glad tidings of Paradise. To which the Messenger of Allah (s.a.w) said: You do not know. Perhaps he spoke of what did not concern him or he was greedy with that which would not decrease him.