BT BQ 55a(27) :הא חדא ב^י^עתא בש^י^חלא והא כמה ביעי בש^י^חלא‏ : [the difference between wild and domestic geese is] the one has one egg at a time and the other has a number of eggs at a time
See the entire entry for šḥl#4 n.m. bearing eggs