“ A woman who brought as her sin-offering a turtledove and as her burnt-offering a pigeon, she must do it over and bring as her burnt-offering a turtledove. If she brought as her burnt-offering a turtledove and as her sin offering a pigeon she must do it over and bring for her burnt-offering a pigeon. Ben Azzai said we follow whichever bird is offered first. A woman who brought her sin-offering and died, her heirs must bring her burnt-offering. ”

“ For [the rule is that] a bird which flies [into another group] is invalid, and invalidates one corresponding to it. Mishnah 2 How is it? If there are two women, this one has two pairs and this one has two birds and one bird flew from this woman's [pair] to the other woman's [pair] , it invalidates one bird by its leaving. If it then returned [to its original pair] it invalidates one by returning. If it flew back and forth multiple times it does not cause further invalidation since even if they are mixed up, there are at least two [valid] birds remaining. ”