'Instruction' in the Bible

So Moses numbered them according to the instruction of the LORD, as he had been commanded.

" 'This is the regulation of the Nazirite who has made a vow of his offering to Yahweh according to his separation, {in addition to what he can afford}. In accordance to the word of his vow that he vowed, he will do, concerning the instruction of his separation.'"

They put him in custody, because there was no clear instruction about what should be done to him.