Is a verbal will regarding land previously documented with partition contracts and a final division enforceable, if it was not written down and only two people knew about it?

The land that the father divided, and the sons acquired, then you bought your brothers' shares of it, is yours. The father's will to divide it has no effect because it passed out of his ownership. As for the remaining plots of land, they belong to those to whom they were gifted and who acquired them. The brother's claim of a will is not acceptable due to lack of proof. Even if proven, it would have no effect because it does not explicitly state a revocation of the gift, and because it is a will by action, not by word. Revocation of a gift must be by explicit statement. The father's disposition of the gifted property after the son's possession is not considered a revocation without a verbal declaration.