"before the L-rd your G-d": in the respective precincts.
"you, your sons, your daughters, your men-servants, your maid-servants": priority being given in order of affection.
"and the Levite in your gates, for he has no portion or inheritance with you": Wherever you find the Levite, give him his portion (first-tithe). If he has no portion, he gives him poor-tithe. If he has no poor-tithe, he gives him peace-offerings.
(Devarim 12:13) "Take heed unto yourselves": a negative commandment.