Verse 34

وَأَخِى هَـٰرُونُ هُوَ أَفْصَحُ مِنِّى لِسَانًا فَأَرْسِلْهُ مَعِىَ رِدْءًا يُصَدِّقُنِىٓ إِنِّىٓ أَخَافُ أَن يُكَذِّبُونِ

And my brother is a more eloquent speaker than me; therefore, send him with me as an assistant, that he may confirm me, I indeed fear that they may reject me.