שמות מ׳:ל׳-ל״ב

ורחצו ממנו משה ואהרן ובניו. יום שמיני למלואים הושוו כולם לכהונה, ותרגומו וִיקַדְּשׁוּן מִנֵּיהּ, בו ביום קָדַשׁ משה עמהם:

Moshe and Aharon ... washed ... from it. On the eighth day of the Installations all of them (Moshe, Aharon and his sons) were equal in the priesthood. Onkelos’ translation [of וְרָחֲצוּ] is: And they sanctified themselves from it. On that very day Moshe was sanctified with them.

ובקרבתם. כמו ובקרבם, כשיקרבו:

And when they approached. וּבְקָרְבָתָם is the same as וּבְקָרְבָם — when they would approach.