The ruling on slaughtering at the beginning of building a house, and at the completion of building the roof, which they call fidyah?

Question:
Our sisters say that among the people there is a custom: when one of them wants to build a dwelling, when the first stone is placed, he slaughters one of the sheep, and when the roof of the house is done, he slaughters one, and they call it fidyah. Is this found in the Sunnah, or is this from bid'ah (religious innovations)? Please guide us. May Allah reward you with good.

Answer:
All of this is among the bid'ah (religious innovations) that . Also, if this slaughter is for the jinn, or slaughtered for the jinn on the belief that this will ward off their harm or bring good to the household, then this is shirk akbar (major shirk), may Allah protect us from it. Slaughter for other than Allah is shirk akbar (major shirk) that takes one out of the religion. However, if they slaughter these animals with the intention that it is for Allah, and they intend obedience to Allah and charity with its meat, then this is among the bid'ah (religious innovations); because there is no evidence for slaughter in this case, or on this occasion. So this is a custom of the jahiliyyah (the pre-Islamic age of ignorance), and it is not free from being either an innovation or shirk (associating partners with Allah) with Allah the Exalted and Majestic. Therefore, it is obligatory to abandon it and warn against it, and to rely upon Allah the Exalted and Glorified, for He is the One who protects His servants, and He is the One who brings them good and wards off harm from them. It is not the slaughtered animals, or those to whom they draw near with slaughter, such as the jinn and Shaytan. All of these are customs of the jahiliyyah (the pre-Islamic age of ignorance) and matters of shirk (associating partners with Allah). Muslims must beware of them. Yes. May Allah reward you with good, and may He do you good