121 Eduyot 2/9-10 & 3/1-2

(9) He used to say: the father transmits to the son beauty, strength, wealth, wisdom, and years. And the number of generations before Him, and that shall be their appointed end: For it is said, "calling the generations from the beginning" (Isaiah 41:4). Although it is said, "And shall serve them, and they shall afflict them four hundred years" (Genesis 15:13), it is also said, "And in the fourth generation they shall return again" (Genesis 15:16).

(10) He also used to say that there are five things that [last] twelve months: The judgment of the generation of the flood, twelve months; The judgment of Job, twelve months; The judgment of the Egyptians, twelve months; The judgment of Gog and Magog in the time to come, twelve months; The judgment of the wicked in hell, twelve months, for it is said, "And it will be from [one] month until the [next appearance of the same] month" (Isaiah 66:23). Rabbi Yohanan the son of Nuri says: From Passover to Shavuot, for it is said, "And from one sabbath until the [next] sabbath" (ibid.).

(1) All things that defile in a tent [i.e. anything that defiles that which is under its same roof-space], if [the pieces of the corpse] were divided and brought into the house: Rabbi Dosa the son of Harkinas [declares everything under the same roof-space] pure, but the Sages [declare it] impure. How so [i.e. what are they]? He who touches as much as two halves of an olive [in quantity] of an animal’s carcass or carries them; or in the case of a [human] corpse, he who touches as much as half an olive (and forms a tent over [i.e. stands over] as much as half an olive; or touches as much as half an olive) and as much as half an olive forms a tent above him; or if he forms a tent over as much as two halves of an olive; or if he forms a tent over as much as half an olive and as much as half an olive forms a tent above him: Rabbi Dosa the son of Harkinas [declares him] clean, and the Sages [declare him] unclean. But if he touches as much as half an olive [in quantity] and another thing forms a tent over him [that is] over as much as half an olive; (or if he forms a tent over as much as half an olive and another thing forms a tent over him and over as much as half an olive), [he is] clean [according to both Rabbi Dosa and the Sages]. Rabbi Meir said: Even in this case Rabbi Dosa [declares him] clean and the Sages [declare him] unclean. In all such cases [he is] unclean, unless there is an act of touching and also an act of carrying, or an act of carrying and also [the state of] being under the same tent. This is the general rule: [If in] whatever [case], [the means of transmitting impurity] are of one name [i.e. category], [he is] impure; if they are of two names, [he is] pure.

(2) Food [in] separate [pieces] does not combine [together to contract impurity]: the words of Rabbi Dosa the son of Harkinas. And the Sages say: It does combine. [One may] exchange [produce from] the second tithe for uncoined metal: the words of Rabbi Dosa. And the Sages say: [One may] not exchange. Hands [alone must be] immersed in order to [touch] the sin-cleansing [water]: These are the words of Rabbi Dosa. And the Sages say: If his hands have become impure, his body [also] becomes impure.