رَبِّ اشْرَحْ لِي صَدْرِي، وَيَسِّرْ لِي أَمْرِي، وَاحْلُلْ عُقْدَةً مِنْ لِسَانِي، يَفْقَهُوا قَوْلِي
Rabbish-rahli sadri, wa yassir li amri, wahlul 'uqdatan min lisani, yafqahu qawli
My Lord, expand my chest, ease my task, and remove the impediment from my tongue, so they may understand my speech.
Recite before exams, presentations, or when explaining something
Prophet Musa (AS) made this dua before going to Pharaoh. It helps with communication, confidence, and clarity.