Nedarim 59A

אמרי: מעשר, דיגון הוא דקא גרים ליה.

The rabbis of the Talmud say: With regard to tithe, the ground does not engender the obligation; placement of the produce in a pile engenders the obligation, as it is only at that point that one is obligated to tithe his produce. Therefore neutralization of the prohibition is not effected by planting it in the ground.

מתיב רמי בר חמא: ״קונם פירות האלו עלי״, ״קונם הן על פי״, ״קונם הן לפי״⁠ — אסור בחילופיהן ובגידוליהן. ״שאני אוכל״, ו״שאני טועם״⁠ — מותר בחילופיהן ובגידוליהן בדבר שזרעו כלה, אבל בדבר שאין זרעו כלה ⁠— אפילו גידולי גידולין אסורין.

Rami bar Ḥama raised an objection to the opinion of R' Yannai based on the Mishnah (57a): For one who says: This produce is konam upon me, or it is konam upon my mouth, or it is konam to my mouth, it is prohibited to partake of the produce, or of its replacements, or of anything that grows from it. If he says: This produce is konam for me, and for that reason I will not eat it, or for that reason I will not taste it, it is permitted for him to partake of its replacements or of anything that grows from it. This applies only with regard to an item whose seeds cease after it is sown. However, with regard to an item whose seeds do not cease after it is sown, it is prohibited for him to partake even of the growths of its growths. Apparently, permitted growths do not neutralize the prohibition.

אמר רבי אבא: שאני קונמות, הואיל ואי בעי מתשיל עלייהו ⁠— הוו להו כדבר שיש לו מתירין, ואין בטיל ברוב.

R' Abba said: Konamot are different; since if he wishes to do so he can request that a halakhic authority dissolve the vows and render the objects of the vows permitted, their legal status is like that of an item that can become permitted, and its prohibition is not nullified by a majority of permitted items.