Rashi on Leviticus 16:3/רש"י על ויקרא ט״ז:ג׳

1בזאת WITH THIS [SHALL AARON COME] — The numerical value of this word is 410, being an allusion to the 410 years during which the First Temple existed (cf. Leviticus Rabbah 21 9).

2'בזאת יבא אהרן וגו WITH THIS SHALL AARON COME [INTO THE HOLY PLACE] etc. — And this, also, shall not be at any time he pleases, but on the day of Atonement, as it is explicitly stated at the end of this section (vv. 29—34). “In the seventh month on the tenth day of the month [ye shall fast … And the priest … shall make expiation]".