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ואת בניו. בנו כְתִיב, שֶׁהָיָה לוֹ בֵן גִּבּוֹר כְּמוֹתוֹ (תנחומא חקת): ואת בנו [AND WE SMOTE HIM] AND HIS SONS — It is written בנו, "his son" (although read as בניו "his sons"), for he had a son who was as mighty as himself (Midrash Tanchuma, Chukat 25).