Exodus 22:29-31

29“1You shall not hold back the offering from your entire harvest and your 2wine. 3The firstborn of your sons you shall give to Me. 304You shall do the same with your oxen and with your sheep. It shall be with its mother for seven days; 5on the eighth day you shall give it to Me.

31“6You shall be holy people to Me, therefore 7you shall not eat any flesh torn to pieces in the field; you shall throw it to the dogs.