Is it permissible for a foster daughter to expose her face while greeting her foster father?
A: The number of times of suckling which prohibit marriage is five times or more in the first two years of the child. If this was the case, she becomes his foster daughter and she is permitted to shake hands with him and kiss his head as a kind of honoring him. Allah (Exalted be He) says,
Forbidden to you (for marriage) are: your mothers, your daughters
to His Saying,
...your foster milk suckling sisters
Allah (Exalted be He) also says,
The mothers shall give suck to their children for two whole years, (that is) for those (parents) who desire to complete the term of suckling
It was authentically reported that the Prophet (peace be upon him) said,
Wet-nursing makes unlawful what consanguinity makes unlawful.
It was reported on the authority of
`Aishah (may Allah be pleased with her) that she said,
It was revealed in the Qur'an that ten clear sucklings prohibit marriage, then it was abrogated (and substituted) by five clear sucklings, and the Prophet (peace be upon him) died while it was likewise.
Suckling means that the child takes hold of the breast and sucks the milk, and if he leaves it and then suckles it again, this is a second time and so on. (Part No. 17; Page No. 383) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.