What is the expiation for the sin of someone who entered their neighbor's house deceitfully and swore falsely upon the Qur’an to deny their action out of fear of scandal?

It is not permissible for a Muslim to enter anyone's house without their permission, for Allah Almighty says: "O you who have believed, do not enter houses other than your own houses until you ascertain permission and greet their inhabitants. That is better for you that you may remember." Entering a house without permission is a reprehensible act, and curiosity does not justify it. Furthermore, swearing a false oath is considered a "Yamin Ghamus" (a dip-in-sin oath), from which one must repent. There is no expiation for a Yamin Ghamus, according to the more accurate opinion.