Honorable Shaykh, Shaykh Salih asks about the oath of immersion: what is it, and what is its ruling? May Allah reward you with good.

Question:
Honorable Shaykh, Shaykh Salih asks about the oath of immersion: what is it? And what is its ruling? May Allah reward you with good.

Answer:
The oath of immersion is the one a person swears regarding a past matter, lying intentionally. If he swears to a past matter, lying intentionally, this is the oath of immersion. For example, if he says, "By Allah, so-and-so did not come," while he knows he did come; or "By Allah, this thing is not with me," while it is with him; or something similar. Or if he says, "This item was bought for such-and-such," and he is lying; or "It will yield such-and-such from it," or "This item is free from such-and-such defect," and he is lying in that. All of this is among the oaths of immersion regarding which warnings have come. However, you must repent to Allah, the Exalted and Sublime. Yes. May Allah reward you with good, and may He do you good.