وَيَضِيقُ صَدْرِي وَلَا يَنطَلِقُ لِسَانِي فَأَرْسِلْ إِلَى هَارُونَ
[26:13]
And by breast straitens, and my tongue is not eloquent, therefore send Thou to Haroun (to help me);
"My breast will be straitened. And my speech may not go (smoothly): so send unto Aaron.
And I shall be embarrassed, and my tongue will not speak plainly, therefor send for Aaron (to help me).