[If] one buys a field from his father — [if] his father died and he then consecrated it, it is like an ancestral field; [if] he consecrated it, and then his father died, it is like an acquired field; [these are] the words of R’ Meir. R’ Yehudah and R’ Shimon, however, say: [It is] like an ancestral field; as it says (Lev. 27:22): But if it is the field of his acquisition, which is not of the fields of his ancestral holding — [it must be] a field that does not stand to become the field of [his] ancestral holding. That excludes this [field], which stands to become the field of [his] ancestral holding. An acquired field does not go out to the Kohanim at Yovel, because a person cannot consecrate something that is not his. Kohanim and Leviim may always consecrate and may always redeem, both before Yovel and after Yovel.

One who consecrates his field at a time when the Yovel is not in force, they say to him, ‘You bid first;’ for the owner gives a fifth, whereas any other person does not give a fifth. [There was] a story of a person who consecrated his field because of its poor quality. They said to him: ‘You bid first,’ [and] he said, ‘It is mine for an issar.’ R’ Yose said: This one said nothing other than, ‘for an egg;’ for consecrated property may be redeemed with money or with something worth money. He said to him, ‘It is yours!’ Thus, he was found to have lost an issar, and his field was still his.