Commentary for Kiddushin 140:16
אמר רבי חמא בר חנינא כשהקדוש ברוך הוא
R'Hama B'R'Hanina said: When the Holy One, blessed be He, causes His divine Presence to rest, it is only upon families of pure birth in Israel, for it is said: At that time, saith the Lord, will I be the God of all the families of Israel<span class="x" onmousemove="('comment',' Jer. XXXI, 1.');"><sup>27</sup></span> - not unto all Israel, but unto 'all the families of Israel', is said<span class="x" onmousemove="('comment',' The limitation must exclude those of questionable birth.');"><sup>28</sup></span> - and they shall be my people. Rabbah son of R'Huna said: This is the extra advantage which Israel possesses over proselytes.<span class="x" onmousemove="('comment',' Lit., 'which is between Israel and proselytes.'');"><sup>29</sup></span> For in respect to Israel it written, and I will be their God, and they shall be my people;<span class="x" onmousemove="('comment',' Ezek. XXXVII, 27; i.e., God calls them first, and they accept the call.');"><sup>30</sup></span> whereas of proselytes it is written, for who is he that hath boldness to approach unto me? Saith the Lord. And ye shall be my people', and I will be your God.<span class="x" onmousemove="('comment',' Jer. XXX, 21f; i.e., they must first call upon God, Who willingly accepts them. There is no spirit of exclusiveness in this: God first appeared unto Israel; thereafter, He is ready to accept all who call upon Him.');"><sup>31</sup></span> R'Helbo said: Proselytes are as injurious to Israel as a scab, for it is said: And the stranger shall join himself with them, and they shall cleave [we-nispehu] to the house of Jacob.<span class="x" onmousemove="('comment',' Isa. XIV, 1.');"><sup>32</sup></span> Here it is written: 'wenispehu'; whilst elsewhere it is written. [This is the law for all manner of plague of leprosy.] and for rising, or for a scab [sappahath].<span class="x" onmousemove="('comment',' Lev. XIV, 55. We-nispehu is thus connected with sappahath, and the former verse is translated: and they shall be as a scab to the house of Jacob. - Rashi states: because their lax observance of precepts sets a bad example to true born Jews. Tosaf. suggests the reverse: proselytes are more observant, and expose the laxity of other Jews! Cf. infra p. 387.');"><sup>33</sup></span> R'Hama B'Hanina said: When the Holy One, blessed be He,