BT Ber 28a(43) :דריש מר שבתא ומר שבתא אתו לאיקנויי‏ : (if ) one expounds on one Sabbath, and the other (expounds on an alternate) Sabbath, they are apt to be jealous of one another
See the entire entry for qny#2 vb. to be jealous

BT Ber 28a(43) :דריש מר שבתא ומר שבתא‏ : (if ) one expounds on one Sabbath, and the other (expounds on an alternate) Sabbath
See the entire entry for šabbā{šubbā), šabbəṯā (šubbəṯā) n.f. sabbath; week