Deuteronomy 12:15, 20

“However, you may slaughter and eat meat within any of your towns, as much as you desire, according to the blessing of the LORD your God that he has given you. The unclean and the clean may eat of it, as of the gazelle and as of the deer.

“When the LORD your God enlarges your territory, as he has promised you, and you say, ‘I will eat meat,’ because you crave meat, you may eat meat whenever you desire.