LXX Deut 25:7

ἐὸν δὲ μὴ βούληται ὁ ἄνθρωπος λαβεῖν τὴν γυναῖκα τοῦ ἀδελφοῦ αὐτοῦ, καὶ ἀναβήσεται ἡ γυνὴ ἐπὶ τὴν πύλην ἐπὶ τὴν γερουσίαν καὶ ἐρεῖ Οὐ θέλει ὁ τοῦ ἀνδρός μου ἀναστῆσαι τὸ ὄνομα τοῦ ἀδελφοῦ αὐτοῦ ἐν Ἴ’ οὐκ ἠθέλησεν ὁ ἀδελφὸς τοῦ ἀνδρός μου.

But if the man does not want to marry his brother’s widow, she is to go to the elders at the city gate and say, “My husband’s brother refuses to preserve his brother’s name in Israel. He is not willing to perform the duty of a brother-in-law for me.”