Exodus 12:13

13 aThe blood shall be a sign for you, on the houses where you are. And when I see the blood, I will pass over you, and no plague will befall you to destroy you, when I strike the land of Egypt.

Joshua 2:18

18 bBehold, when we come into the land, you shall tie this scarlet cord in the window through which you let us down, cand you shall gather into your house your father and mother, your brothers, and all your father’s household.

Ezekiel 9:4-6

4And the Lord said to him, “Pass through the city, through Jerusalem, and dput a mark on the foreheads of the men who esigh and groan over all the abominations that are committed in it.” 5And to fthe others he said in my hearing, “Pass through the city after him, and strike. gYour eye shall not spare, and you shall show no pity. 6 hKill old men outright, young men and maidens, little children and women, but itouch no one on whom is the mark. And jbegin at my sanctuary.” So they began with the elders who were before the house.

Mark 14:44

44Now the betrayer had given them a sign, saying, “The one I will kiss is the man. Seize him and lead him away under guard.”
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