Tractate Meilah - Chapter 6 - Mishnah 3 מעילה פרק ו׳ משנה ג׳

If he gave him a perutah and said to him: “Bring me for half a perutah lamps and for the other half wicks,” and he went and brought for the whole perutah wicks or for the whole perutah lamps; Or if he said to him, “Bring me for the whole lamps or for the whole wicks,” and he went and brought for half [a perutah] lamps and for the other half wicks, neither is guilty of sacrilege. But if he said to him, “Bring for half a perutah lamps from one place and for half a perutah wicks from another,” and he went and brought the lamps from the place where the wicks [were to be bought] and the wicks from the place where the lamps [were to be bought], the agent is guilty of sacrilege.