Midrash su Numeri 28:31

(Numb. 16:15, cont.:) AND HE SAID UNTO THE LORD: PAY NO ATTENTION UNTO THEIR MEAL OFFERING. Do not receive them in repentance.³⁵Tanh., Numb. 5:7; Numb. R. 18:10, cont. Should Scripture have said: "Pay no attention unto their liturgical service"? What is the meaning of MEAL OFFERING? This is what Moses said to the Holy One: Sovereign of the World, I know that these have a share in this meal offering that <Israel> has presented,³⁶The singular verb that the Buber text has here is obviously a misprint, since Buber himself cites the passage with a plural verb in note 66 of his edition. “Israel,” as the implied subject, is found written in both parallel texts listed in the previous note. [since it is stated] (in Numb. 29:22, 28, and 38): IN ADDITION TO THE REGULAR BURNT OFFERING, ITS MEAL OFFERING, AND ITS DRINK OFFERING; and it was presented <as an offering> of what belonged to all Israel (including sinners). In as much as these have withdrawn from your children, do not pay attention to their portion. The fire will leave it alone and not consume it.

(Bamidbar 28:31) "Unblemished shall they be for you, and their libations": The libations are being likened to the (sacrificial) animal. Just as the animal is rendered unfit by blemishes, by deficiency or superfluity, so, the libations.