O our Lord ! accept (this service) from us, verily You and You (alone) are the Hearer, the Knower, surely You are the receiver of repentance, the Merciful
رَبَّنا تَقَبَّل مِنّا ۖ إِنَّكَ أَنتَ السَّميعُ العَليمُ وَتُب عَلَينا ۖ إِنَّكَ أَنتَ التَّوّابُ الرَّحيمُ
Rabbana taqabbal minna innaka antas samee ul aleem wa tub alayna innaka antat tawwabur raheem
This is the dua of Prophet IBRAHIM And Prophet ISMAIL (peace be upon them) which they recited while building the Holy Kabah.