'Scarlet Cord' in the Bible

unless, when we enter the land, you tie this scarlet cord to the window through which you let us down. Bring your father, mother, brothers, and all your father’s family into your house.

“Let it be as you say,” she replied, and she sent them away. After they had gone, she tied the scarlet cord to the window.

Your lips are like a scarlet cord,and your mouth is lovely.Behind your veil,your brow is like a slice of pomegranate.