G'MATRIYA based on L'ORA SHEL TORAH by R. Yaakov Auerbach z"l

At the end of the sedra (8:35) the Torah tells us that Aharon and his sons were not allowed to leave the Mishkan during the seven inaugural days (and nights). They were to observe the MISHMERET HASHEM... lest they die. The Ramban says that this was not just a one-shot command, but it is a mitzva that applies through thegenerations, that a Kohen may not leave the Mikdash while in the midst of service. This, the Torah tells us specifically as applied to the Kohen Gadol (21:12). By extension based on another pasuk, the rule applies to all Kohanim.

R. Auerbach z"l found a beautiful numeric link between the MISHMERET HASHEM of the first week of the Mishkan and the Kohen Gadol's prohibition and the inclusion of all Kohanim in the rule.

MISHMERET HASHEM = 40+300+40+200+400 (980) + 26 = 1006.

V'LO Y'CHALEIL ET MIKDASH ELOKAV (said concerning Aharon) = 30+1 (31) + 10+8+30+30 (78) + 1+400 (401) + 40+100+4+300 (444) + 1+30+5+10+6 (52) = 1006.

V'HA'Y'TA LO U'L'ZAR'O ACHARAV (and it shall be for him and his offspring after him, indicating all Kohanim through the generations)

6+5+10+400+5 (426) + 30+6 (36) + 6+30+7+200+70+6 (319) + 1+8+200+10+6 (225) = 1006.

Not sufficing with this neat triple equation, R. Auerbach z"l takes the whole pasuk: And it shall be for him and his offspring the eternal covenant of the Kehuna, because he defended G-d's honor, and atoned for Bnei Yisrael. (This verse said of Pinchas). G'matriya = 4800. Then back to the original pasuk from Tzav: And inthe entrance of Ohel Mo'ed they shall sit day and night for seven days, and they shall guard the MISHMERET HASHEM - this too totals 4800. And he brings a third numeric connection between the prohibition of leaving the Mikdash in mid-work (Vayikra 10:7) and the blessing of the Kohanim (Vzot HaBracha - YORU MISHPATECHA...)both of which total 3558; the verse in the blessing for Levi definitely referring to future generations.