Ash Shu'ara, 13 Ayah
26:13
وَيَضِيقُ صَدۡرِي وَلَا يَنطَلِقُ لِسَانِي فَأَرۡسِلۡ إِلَىٰ هَٰرُونَ ١٣
Wa Yađīqu Şadrī Wa Lā Yanţaliqu Lisānī Fa'arsil 'Ilá Hārūna
And that my breast will tighten and my tongue will not be fluent, so send for Aaron.