ROM 2:29

29 The true Yehudi is so in [Hashemʼs] hidden way, and true milah is of the lev, in the [[hitkhadshut (renewal) of the]] Ruach Hakodesh, not in [chumra [(stringency, boasting of zokheh in machmir meritorious strict)]] letter. He has y'hodeh [(praise)] that comes not from Bnei Adam but from Hashem.