A muslim person joined our company,while she was ping through the corridor I heard two?

Yes, it was. That's incredibly bigoted and I think you should report it, or encourage her to report it, if it ever happens again or escalates. They should not be haring her for her religious beliefs. They shouldn't be haring her or any other person, period. No one should have to put up with immature jerks and have a miserable time at work.