Condolences to the son of a deceased man who abandoned prayer

Question:
He says: Honorable Shaykh, may Allah grant you success, my neighbor passed away while he was abandoning prayer and consuming riba (usury or interest). Is it permissible for me to offer condolences to his son, who is a righteous young man?

Answer:
Yes, it is permissible to offer condolences to a Muslim for a relative who is a disbeliever; it is permissible to be consoled for a relative who is a disbeliever. As for the disbeliever, he is not offered condolences. However, if a Muslim dies and he has a disbelieving relative, it is permissible to offer condolences to him, because he is a Muslim and has the right to be consoled. But do not make du'a' (supplication) for the deceased, and do not say, “May Allah forgive your deceased,” as long as he did not pray. Do not supplicate for his forgiveness; rather, say, “May Allah reward you with good in your condolence, and may Allah console you in your loss,” and nothing more. Do not say, “May Allah forgive your deceased,” because the deceased is a disbeliever.