Foolish Piety - Chasidut shel Shtut
Verses in Tanach
Talmud / Midrash and commentaries
Sotah 20a, 21b
Yerushalmi Sotah 3:4
Post Talmud / Midrash, Pre-Rishonim
Mishneh Torah and commentaries
Rishonim [Pre-"Code of Jewish Law"]
Tur, Shulchan Aruch ["Code of Jewish Law"] and Commentaries
Beit Yosef Yoreh Deah 185:3 s.v. "Umah sheKatav ve'Im Notenet"
Kitzur Shulchan Aruch 92:1
Mishnah Berurah 328:6
Acharonim [Post-"Code of Jewish Law"]
Recent Authorities
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