Reference for Sanhedrin 115:7

דתניא (בראשית ב, כד) על כן יעזב איש את אביו ואת אמו רבי אליעזר אומר אביו אחות אביו אמו אחות אמו ר"ע אומר אביו אשת אביו אמו אמו ממש

— Rab Judah said, There is no difficulty: one dictum is by R. Meir according to R. Eliezer, and one is by R. Meir according to R. Akiba.<span class="x" onmousemove="('comment',' Rashi states that both were his teachers, and cites Bezah 3b as proof. The J.E. (v. Meir) and Weiss, Dor II, 132, do not give R. Eliezer as one of his teachers. Nevertheless he may well have transmitted some of his rulings. ');">⁷</span>

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