Tosefta על שבת 14:1

Three things they said before Rabbi Yishmael and he did not say whether they were prohibited or permitted, and Rabbi Yehoshua ben Matya figured them out. The one who lances an abscess on Shabbat, if it is to scrape it and make for it an opening in the same manner as a doctors do, he is liable. If it is to draw pus from it, he is exempt. Garlic and half-ripe grapes and parched ears that one was pressing while it was still daytime, Rabbi Yishmael says, he may finish it after it gets dark. But Rabbi Akiva says, he may not finish it, but the priests acted according to Rabbi Yishmael.