Chagigah 8A

אלמא קסבר ⁠— חגיגת ארבעה עשר לאו דאורייתא.

Apparently, he holds that the Festival peace-offering of the 14th does not apply by Torah law, and therefore one may bring it even from second-tithe funds.

אמר מר, בית הלל אומרים: מן המעשר. אמאי? דבר שבחובה הוא, וכל דבר שבחובה אינו בא אלא מן החולין? אמר עולא: בטופל.

§ The Master said in the baraita that Beit Hillel say: Festival peace-offerings may be brought even from the second tithe. The Talmud asks: Why? It is an obligatory matter, and any obligatory matter may come only from non-sacred property. Ulla said: This is referring to a case where one combines, i.e., the offering is purchased with a combination of second-tithe funds and non-sacred money. The Talmud adds that amora’im dispute the details of this halakha.

חזקיה אמר, טופלין בהמה לבהמה, ואין טופלין מעות למעות. ורבי יוחנן אמר: טופלין מעות למעות, ואין טופלין בהמה לבהמה.

Ḥizkiya said: One may combine one animal with another animal. If one has a large household for which one animal will not suffice, he brings one animal for the Festival offering from non-sacred money and he may combine funds of second tithe to purchase a second animal. Since he has fulfilled his obligation of the Festival offering by bringing one animal from non-sacred money, he may bring the others from second tithe or animal tithes. But one may not combine money with other money, i.e., one may not combine second-tithe funds with non-sacred money toward the purchase of one animal for the Festival offering. And R' Yoḥanan said: One may combine money with other money, but one may not combine one animal with another animal.

תניא כוותיה דחזקיה, תניא כוותיה דרבי יוחנן. תניא כוותיה דרבי יוחנן: ״מסת״⁠ — מלמד שאדם מביא חובתו מן החולין. ומנין שאם רצה לערב מערב ⁠— תלמוד לומר: ״כאשר יברכך ה׳ אלהיך״.

The Talmud comments: It is taught in a baraita in accordance with the opinion of Ḥizkiya, and it is taught in another baraita in accordance with the opinion of R' Yoḥanan. The Talmud elaborates: It is taught in a baraita in accordance with the opinion of R' Yoḥanan: “After the measure of the gift offering of your hand” (Deuteronomy 16:10). This teaches that a person brings his obligatory offering from non-sacred property. And from where is it derived that if one wishes to mix he may mix? The verse states: “As YHWH your God blesses you” (Deuteronomy 16:10), i.e., one may use any money with which God has blessed him, even second tithe. The term: Mix, means combining money from different sources.