Reference for Bava Batra 70:1

אית ליה דררא דממונא ולההוא אית ליה דררא דממונא הכא אי דמר לא דמר ואי דמר לא דמר

had [at some time] a pecuniary interest [in the article in dispute].<span class="x" onmousemove="('comment',' I.e., each was at some time the owner of the cow or the slave. ');">¹</span> but in this case of R. Nahman, if the property belonged to one, It never belonged to the other.

Jastrow