The ruling on saying: “In your trust,” and swearing by the trust

Question:
May Allah reward you. Your Eminence, the father, the questioner asks: Is it permissible to say “in your trust,” meaning to prohibit an action? And likewise, saying “trust,” and the intended meaning is

Answer:
It is not permissible to swear by the trust. This prohibition has been reported; the prohibition against swearing by the trust has been reported. I say “trust” (amanah); this is an oath, but the waw is omitted, meaning “and the trust.” Therefore, this is not permissible. As for “in your trust” (fi dhimmatik), if the intention is that you bear this in your trust, or as a guarantee, there is no harm in saying “in your trust,” meaning in your guarantee and your pledge. However, if the intention is an oath, it is not permissible, even if “in” (fi) is used instead of the waw.