Now therefore swear ye to me by the Lord, that as I have shewn mercy to you, so you also will shew mercy to my father’s house: and give me a true token,

“Now therefore, I pray you, swear unto me by the Lord,.... Which being a religious action, and done by men that feared the Lord, she knew it would be binding upon them: the Targum is,"swear to me by the Word of the Lord:" since I have showed you kindness; by receiving them with peace into her house, and hiding them when inquired for and demanded of her; in doing which she risked her own, life, had this treachery to her country, as it would have been deemed, been discovered; that you will also show kindness unto my father's house; she mentions not herself and household, for if this was granted that would be implied and included; and this she presses for by the law of retaliation and friendship, for since she had shown kindness to them, it was but reasonable it should be returned: and give me a true token; that she and her father's house would be saved by them when the city should be taken and the inhabitants destroyed; a token that would not deceive her, on which she might depend, and would be firm and sure.”

“Swear unto me by the Lord - This is a farther proof that this woman had received considerable instruction in the Jewish faith; she acknowledged the true God by his essential character Jehovah; and knew that an oath in his name was the deepest and most solemn obligation under which a Jew could possibly come. Does not this also refer to the command of God, Thou shalt fear the Lord, and shalt swear by his name? See the note on Deu 6:13.”

“True token, such a one as, when I shew it to the Israelites, they may preserve me and mine. She is not content with a verbal promise, she requires something permanent and sensible, as a mark of their mutual engagements, (Calmet) a token of their sincerity. They afterwards appointed a piece of scarlet to be hung out of the house, where those were to be collected who should be entitled to protection. Rahab was bound not to divulge their secret, nor to betray them. If she had instructed others of her fellow-citizens to hang out the same mark, she would have forfeited all her privileges, ver. 20. (Haydock)”