[Regarding] a consecrated perutah that fell into a purse, or [if the owner] said, “A perutah in this purse shall be consecrated,” [then] as soon as he spends the first [perutah], he has committed me’ilah, these are the words of R’ Akiva; but the Sages say: [He does not commit me’ilah] until he spends the entire purse.  R’ Akiva agrees regarding one who says, “A perutah of this purse shall be consecrated,” that he may spend and continue [to spend the money] until he spends the entire purse.