[If a woman] who had previously given birth and one who had not previously given birth [were the wives] of two men, and they [now] gave birth to two males, the one whose wife had not [previously] given birth must give five selaim to a Kohen. [If they gave birth to] a male and a female, there is nothing here for a Kohen.  [If] the son died within thirty days, even though he had given to a Kohen, he must return five selaim to him; after thirty days, even though he had not given, he must give. [If] he died on the thirtieth day, it is like the day before it. R’ Akiva says: If he gave, he does not take [it] back; but if he did not give, he need not give [it].  [If] the father died within thirty days, it is presumed that [the son] had not been redeemed, until he brings proof that he was redeemed; after thirty days it is presumed that he had been redeemed until they tell him that he was not redeemed.  [If] he has himself to redeem and his son to redeem, he takes precedence over his son. R’ Yehudah says: His son takes precedence over him, for his obligation is incumbent upon his father, but his son’s obligation is incumbent upon him.