Exodus 22:28-31 - Regulations Regarding Tribute And Holiness
28 " 'You will not curse God, and you will not curse a leader among your people.
29 " 'You will not delay the fullness of your harvest and the juice from your press; you will give me the firstborn of your sons. 30 You will do likewise for your ox and for your sheep and goats; seven days it will be with its mother; on the eighth, you will give it to me.
31 And you will be men of holiness for me; and you will not eat meat [from] a carcass mangled in the field; you will throw it to the dog.