NET
3 Now when they are saying, “There is peace and security,” then sudden destruction comes on them, like labor pains on a pregnant woman, and they will surely not escape.
Darby
3 When they may say, Peace and safety, then sudden destruction comes upon them, as travail upon her that is with child; and they shall in no wise escape.
KJV
3 For when they shall say, Peace and safety; then sudden destruction cometh upon them, as travail upon a woman with child; and they shall not escape.