משנה על בכורים 3:1

Bikkurim are brought only from the seven species. Not from dates grown on hills, nor from [the other species] grown in the valley, nor from olives that are not choice. Bikkurim are not to be brought before Shavuot. The people from Mt. Zevoim brought bikkurim prior to Atzeret (Shavuot), but they did not accept from them, on for it is written in the Torah: “And the festival of the harvest, the first-fruits of your labors, which you have sown in the field” (Exodus 23:16).

Regarding terumah and bikkurim:One is liable to death And the [additional] fifth; And they are forbidden to non-priests; And they are the property of the priest; And they are neutralized in a hundred and one parts; And they require the washing of hands; And the setting of the sun. These [laws] apply only to terumah and bikkurim, but not to tithe.

And there are [laws] which apply to bikkurim which do not [apply] to terumah or maaser sheni:For bikkurim can become acquired while still attached [to the soil]. And a man may make his entire field bikkurim; He is responsible for them; And they require a sacrifice, a song, waving and spending the night in Jerusalem.