Dalil
العربية

Quran Ash-Shu'ara 26:13

وَيَضِيقُ صَدۡرِي وَلَا يَنطَلِقُ لِسَانِي فَأَرۡسِلۡ إِلَىٰ هَٰرُونَ

Translation

And that my breast will tighten and my tongue will not be fluent, so send for Aaron.