Deuteronomy 25:7-9

Amplified Bible

⁷ But if the man does not want to marry his brother’s [widowed] wife, then she shall go up to the gate [of the city, where court is held] to the elders, and say, ‘My brother-in-law refuses to continue his brother’s name in Israel; he is not willing to perform the duty of a husband’s brother.’ ⁸ Then the elders of his city will summon him and speak to him. And if he stands firm and says, ‘I do not want to marry her,’ ⁹ then his brother’s widow shall approach him in the presence of the elders, and pull his sandal off his foot and spit in his face; and she shall answer and say, ‘So it is done to that man who does not build up his brother’s household.’