Reference for Gittin 34:8

איפוך

But have we not been told just the opposite [with regard to R. Johanan and Resh Lakish]? For it has been stated: 'From what point of time can the divorced woman begin to draw the increment? R. Johanan says: From the time [when the Get] is written; Resh Lakish says: From the time when it is delivered'? — Reverse the names.

Jastrow