Ruth 4:7
It was the custom for the seller to take off his sandal and give to the buyer to settle a sale or exchange of property. By doing this, Israelites showed that the matter was settled.
Deuteronomy 25:7-10
If the man does not desire to take his brother's wife, his brother's wife shall go up to the gate to the elders and say: My husband's brother refuses to establish a name for his brother in Israel. He is not willing to perform the duty of a husband's brother to me.
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