رَبِّ اشْرَحْ لِي صَدْرِي وَيَسِّرْ لِي أَمْرِي وَاحْلُلْ عُقْدَةً مِّن لِّسَانِي يَفْقَهُوا قَوْلِي
Rabbish-rahli sadri wa yassir li amri wahlul 'uqdatan min lisani yafqahu qawli
My Lord, expand my chest, ease my task for me, and untie the knot from my tongue so that they may understand my speech.
Musa (AS) said this when Allah sent him to confront Pharaoh. He asked for three things: an expanded chest (courage and peace of mind), ease in his mission (removal of obstacles), and eloquence (Musa had a speech impediment). For students, teachers, speakers, and anyone facing a daunting task — this du'a addresses the internal barriers (anxiety), external barriers (difficulty), and communicative barriers (inability to express yourself).
Related Du'as
رَبَّنَا أَتْمِمْ لَنَا نُورَنَا وَاغْفِرْ لَنَا إِنَّكَ عَلَىٰ كُلِّ شَيْءٍ قَدِيرٌ
Our Lord, perfect our light for us and forgive us. Indeed, You are over all things capable.
Sahihاللَّهُمَّ عَلِّمْنِي مَا يَنْفَعُنِي وَانْفَعْنِي بِمَا عَلَّمْتَنِي وَزِدْنِي عِلْمًا
O Allah, teach me what benefits me, let me benefit from what You have taught me, and increase me in knowledge.
Hasanاللَّهُمَّ أَلْهِمْنِي رُشْدِي وَأَعِذْنِي مِنْ شَرِّ نَفْسِي
O Allah, inspire me with right guidance and protect me from the evil of myself.
Hasanاللَّهُمَّ إِنِّي أَعُوذُ بِكَ أَنْ أَضِلَّ أَوْ أُضَلَّ أَوْ أَزِلَّ أَوْ أُزَلَّ أَوْ أَظْلِمَ أَوْ أُظْلَمَ أَوْ أَجْهَلَ أَوْ يُجْهَلَ عَلَيَّ
O Allah, I seek refuge in You from going astray or being led astray, from slipping or being caused to slip, from wronging others or being wronged, from behaving ignorantly or being treated with ignorance.
Sahih