Two judges of decrees were in Jerusalem: Admon and Chanan ben Avishalom. Chanan says two things; Admon says seven.  [If] someone went overseas, and his wife demands sustenance —- Chanan says: She must swear at the end, but she need not swear at the beginning. The sons of the Kohanim Gedolim differed with him, and said: She must swear both at the beginning and at the end. R’ Dosa ben Harkinas concurred with their view. Said Rabban Yochanan ben Zakkai: Chanan said well; she need not swear, except at the end.