Reference for Kiddushin 145:2

ואיבעית אימא ה"נ תרי קהלי נינהו ממזר בשתוקי ושתוקי בישראל מחד קהל נפקא (דברים כג, ג) לא יבא ממזר בקהל ה'

As for the assembly of proselytes it is not designated 'assembly'.<span class="x" onmousemove="('comment',' Since there is no verse left to teach their inclusion, and hence the relevant prohibitions do not apply to them.');">³</span> But R'Judah argues: Priests and Levites are deduced from one 'assembly';<span class="x" onmousemove="('comment',' Since both are of the tribe of Levi.');">⁴</span>

Jastrow