It was narrated that Aishah said:

"Al-Harith bin Hisham asked the Messenger of Allah ﷺ: 'How does the Revelation come to you?' He said: 'Like the ringing of a bell, and when it departs I remember what he (the Angel) said, and this is the hardest on me. And sometimes he (the Angel) comes to me in the form of a man and gives it to me.'"

أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ أَنْبَأَنَا سُفْيَانُ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ سَأَلَ الْحَارِثُ بْنُ هِشَامٍ رَسُولَ اللَّهِ ﷺ كَيْفَ يَأْتِيكَ الْوَحْىُ قَالَ " فِي مِثْلِ صَلْصَلَةِ الْجَرَسِ فَيَفْصِمُ عَنِّي وَقَدْ وَعَيْتُ وَهُوَ أَشَدُّهُ عَلَىَّ وَأَحْيَانًا يَأْتِينِي فِي مِثْلِ صُورَةِ الْفَتَى فَيَنْبِذُهُ إِلَىَّ " .