Exodus 22:29-31

29“1You shall not delay the offering from 2your harvest and your vintage. 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 seven days; 5on the eighth day you shall give it to Me.

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