The commencement of the Divine Inspiration 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 that exists), has created man a clot. Read! And your Lord is Most Generous" ..(96.1,2,3)
أَوَّلُ مَا بُدِئَ بِهِ رَسُولُ اللَّهِ ﷺ الرُّؤْيَا الصَّالِحَةُ فَجَاءَهُ الْمَلَكُ فَقَالَ {اقْرَأْ بِاسْمِ رَبِّكَ الَّذِي خَلَقَ * خَلَقَ الإِنْسَانَ مِنْ عَلَقٍ * اقْرَأْ وَرَبُّكَ الأَكْرَمُ}