[For a male]
غَفَرَ اللهُ لَكَ
[For a female]
غَفَرَ اللهُ لَكِ
[Replying to a male]
وَلَكَ
[Replying to a female]
وَلَكِ
غَفَرَ اللهُ لَكَ
[For a female]
غَفَرَ اللهُ لَكِ
[Replying to a male]
وَلَكَ
[Replying to a female]
وَلَكِ
Abdullah Ibn Sarjis (RA) said: I went to see the Prophet (peace and blessings of Allah be upon him) and ate from his food and then said to him:
“May Allah forgive you, O Messenger of Allah.”
…he (peace and blessings of Allah be upon him) replied:
“and you (too).”
“May Allah forgive you, O Messenger of Allah.”
…he (peace and blessings of Allah be upon him) replied:
“and you (too).”
[For a male]
ghafar-allaahu lak
[For a female]
ghafar-allaahu laki
[Replying a male]
wa lak
[Replying to a female]
wa laki
ghafar-allaahu lak
[For a female]
ghafar-allaahu laki
[Replying a male]
wa lak
[Replying to a female]
wa laki
Sources:
Ahmad No# 20778 and others