Rashi on Numbers 6:13/רש"י על במדבר ו׳:י״ג

1יביא אתו means, he shall bring himself. This (the word אתו) is one of the three cases of את with a pronominal suffix which R. Ishmael explained thus (as being reflexive and not accusative pronouns). Similar to it is (Leviticus 22:16): והשאיו אותם עון אשמה “and they will bring אותם the iniquity of trespass”, i.e., “and they will bring upon themselves”. Similar to it is, (Deuteronomy 34:6) ויקבר אתו בני “He (Moses) buried himself in the glen”, (Sifrei Bamidbar 32; cf. Rashi on Leviticus 22:16 and Note thereon).