Egyptian god of death breath.
(If you were surrounded by the dead constantly, your breath would probably suffer as well.
As would your loved ones.
Thank god* for an understanding spouse.)
* Though when you yourself are a god, your thanks might not have that far to go.
Unless you're not allowed to self-thank, if it's like when you work retail, and another employee has to ring up your purchases even though you know well enough how to use the register and your manager would trust you not to take any more than you paid for and you could easily steal whatever you wanted no matter what, but the rules are the rules, so no need to buck policy, and you'll thank a different god if you need to.
** Jesus could be the other god that Osiris thanks.