Reference for Sanhedrin 56:5

אמר רבי ירמיה לא נצרכא אלא לאחי האח

R. Hisda said: The fathers of the bride and bridegroom may testify for eachother; their inter-relationship is no more than that of a lid to abarrel.<span class="x" onmousemove="('comment',' Which is not fastened thereto, but merely lies upon it. I.e., they have a neighbourly but not an intimate relationship. ');">¹⁴</span>

Jastrow

Jastrow