Reference for Bekhorot 99:1

רבי יוחנן אומר

R'Johanan Says: Take a Trajanic or Hadrianic denar which is rubbed off<span class="x" onmousemove="('comment',' Jewish coins restamped by Trajan etc., v. A.Z.. Sonc. ed., p. 267 nn. 7-8.');">¹</span>

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