How would say you "salt of the earth" in Latin?

I've tried some online translators and I didn't find them to be very helpful. I need it in the biblical context of Matt 5:13 ""You are the salt of the earth. But if the salt loses its saltiness, how can it be made salty again? It is no longer good for anything, except to be thrown out and trampled by men." Please include how to pronounce the translated Latin phrase! Thank you!