Pronunciation: Rabbana taqabbal minna. Innka anata-s sami'u-i 'alim.
Translation: Our Rabb! Accept from us. You indeed, You are the All-Hearing, the all-Knowing.

This du'a is mentioned in Surah Al-Baqarah, 2:217. This du'a was made by prophets Ibrahim (A) and Ismail (A), when they were rebuilding the Ka'bah. They wanted Allah (swt) to accept their efforts in the construction of Ka'abah. Allah (swt) granted their desires and made the Ka'bah our Qiblah and the spiritual center for the entire Muslim world.

Learn another du'a.