But  the  firstling  of a  cow ,  or  the  firstling  of a  sheep ,  or  the  firstling  of a  goat , thou shalt  not  redeem ;  they   are  holy : thou shalt  sprinkle  their  blood  upon  the  altar , and shalt  burn  their  fat   for   an offering made by  fire , for a  sweet  savor  unto the  LORD .