The commencement of (the Divine Inspirations to) Messenger of Allah ﷺ was in the form of true dreams. The Angel came to him and said, "Read! In the Name of your Lord Who has created all exists), has created man from a clot. Read! And your Lord is Most Generous, Who has taught (the writing) by the pen. (96.1-4)
عَنْ عَائِشَةَ ؓ أَوَّلُ مَا بُدِئَ بِهِ رَسُولُ اللَّهِ ﷺ الرُّؤْيَا الصَّادِقَةُ جَاءَهُ الْمَلَكُ فَقَالَ {اقْرَأْ بِاسْمِ رَبِّكَ الَّذِي خَلَقَ * خَلَقَ الإِنْسَانَ مِنْ عَلَقٍ * اقْرَأْ وَرَبُّكَ الأَكْرَمُ * الَّذِي عَلَّمَ بِالْقَلَمِ}