Is it permissible to study financial specialization and work with it in Tunisia given the absence of Islamic banks? Is training in a usurious bank permissible, and is the money received from it permissible? Is it obligatory to cover the legs in prayer and outside of it? Is it permissible to remove hair from the beard, mustache, and some hairs from the eyebrows?

Specializing in finance, working, or training in usurious banks is forbidden because it falls under the category of cooperating in sin and aggression. This is also due to the Prophet's (peace be upon him) curse upon the one who consumes Riba, the one who feeds it, the one who writes it down, and its two witnesses. A woman must cover her feet in prayer and outside of it. As for removing hair from the beard and mustache, it is permissible for a woman; in fact, it may be obligatory for her. Plucking the eyebrows (namṣ) is forbidden. Piety and prayer are among the causes of sustenance, while consuming what is unlawful prevents the acceptance of supplications and necessitates entry into the Hellfire.