March 18, 2021 (Kitzur: Marit Ayin) References

Tanakh
Exodus 23:19
Exodus 34:26
Numbers 32:22
Deuteronomy 14:21
Proverbs 3:3-4
Proverbs 29:25

Halakha
Mishneh Torah, Sefer Zemanim – Shekalim, Chapter 2 (Maimonides)

Mishnah
Shekalim 3:2

Talmud
Shabbat 64b-65a

Kitzur Shulchan Arukh
Chapter 29: Moral and Ethical Rules Which a Person Should Adopt

Books
Igrot Moshe – Orach Chayim 1:96 (Moshe Feinstein)