“¶ And Iael went out to meete Sisera, and said vnto him, Turne in, my lord, turne in to me, feare not. And when hee had turned in vnto her, into the tent, shee couered him with a mantle.”
1611 King James Version (KJV)
4:18 Fear not - This was a promise of security, and therefore she cannot be excused from dissimulation and treachery.