Zevachim 22B

יצאו מי כיור שיש להם שם לווי. אלא לאו דראויין למי כיור? אלמא מים חיים נינהו!

excluded is water of the Basin, which has a modifier in its name? Rather, since the baraita cannot be referring to the water of the Basin itself, as it is unfit for washing the innards, is it not referring to water that is fit to be water of the Basin? Apparently, the only reason such water could be preferable is because it is flowing water.

תנאי היא. דאמר רבי יוחנן: מי כיור ⁠– רבי ישמעאל אומר: מי מעין הן, וחכמים אומרים: שאר מימות הן.

The Talmud responds: The issue is a dispute between tanna’im, as R' Yoḥanan says: With regard to the water of the Basin, R' Yishmael says: It must be spring water, i.e., flowing water, and the Rabbis say: It may be another type of water.

ערל מנלן? אמר רב חסדא: דבר זה מתורת משה רבינו לא למדנו, מדברי יחזקאל בן בוזי למדנו: ״כל בן נכר ערל לב וערל בשר לא יבא אל מקדשי לשרתני״.

§ The Mishnah teaches that a priest who is uncircumcised disqualifies sacrificial rites he performs. The Talmud elaborates: From where do we derive this? Rav Ḥisda says: We did not learn this matter from the Torah of Moses, our teacher; rather, we learned it from the words of the prophet Ezekiel, son of Buzi: “No stranger, uncircumcised in heart or uncircumcised in flesh, should enter into My Sanctuary to serve Me” (Ezekiel 44:9).

ומנלן דמחלי עבודה? דכתיב: ״בהביאכם את בני נכר ערלי לב וערלי בשר להיות במקדשי לחלל את ביתי״.

And from where do we derive that he desecrates the service after the fact? As it is written: “In that you have brought in strangers, uncircumcised in heart or uncircumcised in flesh, to be in My Sanctuary, to profane My house” (Ezekiel 44:7).

תנו רבנן: ״בן נכר״⁠ – יכול בן נכר ממש? תלמוד לומר ״ערל לב״. אם כן, מה תלמוד לומר ״בן נכר״? שנתנכרו מעשיו לאביו שבשמים. ואין לי אלא ערל לב; ערל בשר מנין? תלמוד לומר: ״וערל בשר״.

A baraita states: The verse states “stranger”; one might have thought that this is referring to an actual stranger, i.e., a non-Jew. Therefore, the verse states: “Uncircumcised in heart,” to indicate that it is referring to a priest rather than a non-Jew. If so, what is the meaning when the verse states: “Stranger”? It is referring to one whose actions are considered estranged from his Father in Heaven, i.e., an apostate, who sins regularly. And I have derived only that one uncircumcised in heart is unfit to serve; from where is it derived that one uncircumcised in flesh is unfit as well? The verse states: “Or uncircumcised in flesh.”