Menachos 1:1-2

Menachos 1:1

All flour offerings from which the handful was taken in the name of the wrong sacrifice remain valid but they do not fulfill the owner’s obligation; the exceptions are the flour offerings of a sinner and of jealousy (i.e., of the sotah). Regarding these, if one removed the handful under the wrong name, or put it in the vessel, brought it to the altar or burned it under the wrong name, or in its own name and not in its own name, or not in its own name and in its own name, in all of these cases it is invalid. “In its own name and not in its own name” means that he offered it as a sinner's flour offering and as a voluntary flour offering; “not in its own name and in its own name” means as a voluntary flour offering and as a sinner's flour offering.

Menachos 1:2

Regarding both a sinner’s flour offering and other flour offerings, let’s say that the handful was removed by a non-kohein, an onen (i.e., one recently bereaved), a t’vul yom (one who immersed by day and must await nightfall), a kohein who was “out of uniform,” one who needed to bring a sacrifice to complete his atonement, one who had not washed his hands and feet, or someone uncircumcised, ritually unclean, sitting, or standing on vessels, an animal or on another person’s feet. In all of these cases, it is invalid. If the handful was taken with the left hand, it is invalid, though Ben Baseira says that in this case he can return the handful and take it again with his right hand. If, when taking the handful, a pebble, a grain of salt or a drop of frankincense came into his hand, it is invalid. This is because we have been told that if a handful is too much or too little, it is invalid. “Too much” means an overflowing handful, while “too little” means that he took the handful using just his fingertips. The proper way is for the kohein to stretch his fingers to the palm of his hand.