Related על עירובין 58:20

Rabbi Eliezer says, we make repayment from one kind on behalf of another kind, as long as we pay from the higher quality on behalf of the lower quality (Ter. 6:6). How is this done? [If] he ate barley and makes repayment from wheat, or dried figs and made repayment from dates, may a blessing come upon him. Rabbi Akiva says, we do not make repayment except for [produce of] one kind on behalf of [produce of] the same kind. [But] Rabbi Eliezer says, just as we make repayment from the new on behalf of the old, so too we make repayment from one kind on behalf of another kind.