– رَّبِّ اغْفِرْ لِي وَلِوَالِدَيَّ وَلِمَن دَخَلَ بَيْتِيَ مُؤْمِنًا وَلِلْمُؤْمِنِينَ وَالْمُؤْمِنَاتِ

Rabbigh-fir lii wa liwaalidayya wa liman dakhala baytiya mu’minan wa lil-mu’miniina wal-mu’minaat. (71:28)

O my Lord, forgive me, my parents, all who enter my house in a state of belief, and (all) believing men and believing women.

Ameen

This was the du’aa of Sayyidna Nuh (a.s.) before the Flood.

(Source: Khalid Baig’s commentary to du’aa #40 in the Accepted Whispers: Munajat-e-Maqbul)