Exodus:22:29-30
jps@Exodus:22:29 @ Thou shalt not delay to offer of the fulness of thy harvest, and of the outflow of thy presses. The first-born of thy sons shalt thou give unto Me.
jps@Exodus:22:30 @ Likewise shalt thou do with thine oxen, and with thy sheep; seven days it shall be with its dam; on the eighth day thou shalt give it Me.