Menachos 7:4-5

Menachos 7:4

If libations were sanctified in a Temple vessel and their offering was found to be unfit, then if there is another offering, the libations should be offered with that. If this is not the case, they should be allowed to become unfit by remaining overnight. The offspring of a thanksgiving offering, or its replacement, and a thanksgiving offering that has been designated to replace one that had been designated and was lost (and then found), do not require bread as per Leviticus 7:12, “He shall offer it with the thanksgiving offering,” i.e., a thanksgiving offering requires bread but not its young, nor one that is brought in its place or that was substituted for it.

Menachos 7:5

If a person takes a vow obligating himself to bring a thanksgiving offering, he must bring it and its bread from unconsecrated property (as opposed to from second tithe). If he vows to bring the thanksgiving offering from unconsecrated property and its bread from second tithe, he must nevertheless bring the bread from unconsecrated property (because the flour offering is subordinate to the animal). If he vows to bring the thanksgiving offering from second tithe and its bread from unconsecrated property, he may do so. If he vows to bring both the thanksgiving offering and its bread from second tithe, he may do so. One should not make the bread from actual second tithe wheat; rather, one should purchase the flour using second tithe money.