“The Messenger of Allah ﷺ went out delighted, then he came back to me sad. I said: ‘O Messenger of Allah, (why did) you go out happy and come back sad?’ He said: ‘I entered the Ka’bah, and I wish that I had not done that, because I am afraid that I may have caused difficulty for my nation after I am gone.’” (Using translation from Ibn Mājah 3064)
خَرَجَ رَسُولُ اللَّهِ ﷺ مِنْ عِنْدِي وَهُوَ قَرِيرُ الْعَيْنِ طَيِّبُ النَّفْسِ ثُمَّ رَجَعَ لِي وَهُوَ حَزِينٌ فَقُلْتُ يَا رَسُولَ اللَّهِ خَرَجْتَ مِنْ عِنْدِي وَأَنْتَ كَذَا وَكَذَا قَالَ «إِنِّي دَخَلْتُ الْكَعْبَةَ وَوَدِدْتُ أَنِّي لَمْ أَكُنْ فَعَلْتُهُ إِنِّي أَخَافُ أَنْ أَكُونَ قَدْ أَتْعَبْتُ أُمَّتِي مِنْ بَعْدِي»