What to say to someone who prays for your forgiveness?

When someone says: ” غَفَرَ اللّٰهُ لَكَ ““May Allah forgive you”, say to him: ” وَلَكَ “ “And may He forgive you too.”

1. Sahih, as-Sunan al-Kubra of an-Nasa'i, no. (10183), 'Amal al-Yawm wa al-Laylah of an-Nasa'i, no. (421), ash-Shama'il al-Muhammadiyyah of at-Tirmidhi, Ihya' at-Turath print, no. (22), and al-Albani graded it Sahih in “Mukhtasar ash-Shama'il” no. (20).