Part of verse 114 of Surah Ta-Ha.
It is a short, direct prayer asking Allah to increase one in knowledge. Students and seekers of knowledge recite it before studying and throughout their lives, since it is a supplication taught by Allah Himself in the Quran.
- 20:114
فَتَعَٰلَى ٱللَّهُ ٱلْمَلِكُ ٱلْحَقُّ ۗ وَلَا تَعْجَلْ بِٱلْقُرْءَانِ مِن قَبْلِ أَن يُقْضَىٰٓ إِلَيْكَ وَحْيُهُۥ ۖ وَقُل رَّبِّ زِدْنِى عِلْمًۭا
Fata'aalal laahul Malikul Haqq; wa laa ta'jal bil Quraani min qabli ai yuqdaaa ilaika wahyuhoo wa qur Rabbi zidnee 'ilmaa