Hesabu 18 : 17 Numbers chapter 18 verse 17

Lakini mzaliwa wa kwanza wa ng'ombe, au mzaliwa wa kwanza wa kondoo, au mzaliwa wa kwanza wa mbuzi, hutawakomboa hao; maana, ni watakatifu hao; utanyunyiza damu yao katika madhabahu, na kuyateketeza mafuta yao kuwa sadaka iliyosongezwa kwa Bwana kwa moto, iwe harufu ya kupendeza.
soma Mlango wa 18

But the firstborn of a cow, or the firstborn of a sheep, or the firstborn of a goat, you shall not redeem; they are holy: you shall sprinkle their blood on the altar, and shall burn their fat for an offering made by fire, for a sweet savor to Yahweh.