early rabbinic sages
An acronym for "חכמינו זכרם לברכה Chakhameinu Zikhram Livrakha" -- Our wise ones, their memory should be for blessing
See Wikipedia https://he.wikipedia.org/wiki/%D7%97%D7%96%22%D7%9C
Used to refer to the set of Jewish rabbis, particularly those involved in the formation of the Mishna and Talmud, as well as those involved in passing any early rabbinic legislation from that time period and earlier.