Pesahim 121a and Pesahim 121b, a rabbinic rule about ritual impurity of the hands for pigul and notar sacrifices, whether the Pesah and the hagiga of the fourteenth of Nisan can be covered by the same beracha, whether the pouring of blood could qualify for those sacrifices supposed to be sprinkled, and whether the she-he-hiyanu at a pidyon ha-ben is said by the father or the kohen.