Leviticus 2:14

And if thou wilt present a mincha of first fruits before the Lord, (ears of wheat) roasted by fire, roasted flour and meal of barley shalt thou offer as a mincha of thy first fruits.

If you bring a first-fruit offering Many people claim [Mekhilta on Exodus 20:22] that this is one case where the word “ if ” introduces an unconditional clause. In my opinion, there is no need for such an assertion. Only the bringing of the choicest first fruit is obligatory [Exodus 23:19], not ordinary first fruits. Anyone who wishes, however, to bring a freewill offering of first fruits, may do so.

ripe ears [Hebrew: ’aviv] so called because it is the original form of the grain, from “progenitor” [Hebrew: ’av]

ground-grain The meaning of this word is known (compare, “my soul is consumed” [Psalms 119:20] even though there the cognate is spelled with a samekh , not a s̀in )

fresh-grain as in, “…and full ears of grain in his sack” [II Kings 4:42].

V’IM (AND IF) THOU BRING A MEAL-OFFERING OF FIRST-FRUITS. “The word im (if) here has the meaning of ki (when), for the bringing [of this meal-offering of the first-fruits] is not a voluntary matter, since Scripture speaks here of the meal-offering of the new barley, which is obligatory. Similarly, ‘V’im’ (and if) the Jubilee of the children of Israel shall be [means ‘when’ the Jubilee will be — for it is bound to come].” This is Rashi’s language.
The correct interpretation is that He used the expression im (if) because He is not commanding the performance now of this precept [namely bringing the meal-offering of the new barley], and He is thus saying: “When you offer a meal-offering baked on the griddle you shall do it in such-and-such a way; and if you offer a meal-offering of the stewing-pan, you shall make it in another way; and if the meal-offering you will bring will be the one of first-fruits, you should do it in this manner.” Thus the word im is here to be understood in its literal sense [namely, “if”]. Then the meaning of the verse, ‘V’im’the Jubilee of the children of Israel shall be is as follows: [The heads of the fathers’ houses of the tribe of Manasseh] said to Moses: “Even ‘if’ the children of Israel will inherit the Land forever, and will be privileged to sanctify the year of the Jubilee, the inheritance [of Zelophchad] will not return to us” [because his daughters might marry men from other tribes, which would cause the land to be transferred to other tribes].
It is also possible that He is stating: “And if you bring a meal-offering of the first-fruits, you shall do it in this prescribed way,” as if He were to say, “if the Eternal your G-d will bring you into the Land, and you will reap the harvest thereof and bring the meal-offering of the first-fruits, you shall do it in such-and-such a manner;” for G-d always mentions the inheritance of the Land to them conditionally, just as He said, For if ye shall diligently keep all this commandment … then will the Eternal drive out all these nations from before you, and so also in many places.

ואם תקריב, when you offer the “Omer,” not “if you offer, etc.”

גרש, similar to the same word with the letter ס as in Lamentations 3,16 ויגרס בחצץ שיני, “He broke my teeth on gravel.” Here the term means that the grain is to be ground in a mill.