رَبِّ ٱشْرَحْ لِى صَدْرِى وَيَسِّرْ لِىٓ أَمْرِى وَٱحْلُلْ عُقْدَةً مِّن لِّسَانِى يَفْقَهُوا۟ قَوْلِى
Lord! Open my breast for me; and ease my task for me, and untie the knot from my tongue so that they may understand my speech.
[Quran 20:25-28]
Dua of Musa (alehesalam) taken from Quran