Reference for Chagigah 6:10

מפני שקדושה ראשונה קדשה לשעתה ולא קדשה לעתיד לבא והניחום כדי שיסמכו עליהן עניים בשביעית

since the first consecration held [only] for the time, but did not hold for the future [permanently], therefore they were left in order that the poor might be sustained upon them in the seventh year.

Jastrow

Jastrow