also take an ox ... will appear to you

Moses continues speaking to Aaron. If you have begun an indirect quotation in verse 8, continue it here. "and to take an ox ... will appear to them" (See:rc://en/ta/man/translate/figs-quotesinquotes and rc://en/ta/man/translate/figs-quotations)

to sacrifice before Yahweh

"to sacrifice to Yahweh"