Quran 26:13 — The Poets (Al-Shu`ara')

وَيَضيقُ صَدرى وَلا يَنطَلِقُ لِسانى فَأَرسِل إِلىٰ هٰرونَ

"I may lose my temper. My tongue gets tied; send for my brother Aaron.

[26:12] He said, "My Lord, I fear lest they disbelieve me.

[26:14] "Also, they consider me a fugitive; I fear lest they kill me."