Reference for Chullin 243:51

תיב לקבלי

whereupon the other [R'Zera] said to him, 'It is the only thing you knew, and you have already told us it!' Come and see the difference between the imperious men of the Land of Israel and the pious men of Babylon!<span class="x" onmousemove="('comment',' Resh Lakish who was of the powerful and imperious men of Palestine (cf. Yoma 9b) treated his informant with courtesy and respect, whereas R. Zera, a Babylonian who was renowned for his piety (cf B.M. 85a) treated his informant with disrespect and insult.');">²⁵</span>

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