NET

30 But if the Lord does something entirely new, and the earth opens its mouth and swallows them up along with all that they have, and they go down alive to the grave, then you will know that these men have despised the Lord!”

Darby

30 but if Jehovah make a new thing, and the ground open its mouth, and swallow them up, and all that they have, and they go down alive into Sheol, then ye shall know that these men have despised Jehovah.

KJV

30 But if the LORD make a new thing, and the earth open her mouth, and swallow them up, with all that [appertain] unto them, and they go down quick into the pit; then ye shall understand that these men have provoked the LORD.