Gratitude
Verses in Tanach
Bereishit 3:12
Devarim 23:8
Talmud / Midrash and commentaries
Avodah Zarah 5a-b
Bava Kama 92b
Bava Metzia 33a
Berachot 63b
Bereishit Rabbah 79:6
Sifri Devarim 252:8
Post Talmud / Midrash, Pre-Rishonim
Mishneh Torah and commentaries
Rishonim [Pre-"Code of Jewish Law"]
Tur, Shulchan Aruch ["Code of Jewish Law"] and Commentaries
Acharonim [Post-"Code of Jewish Law"]
Recent Authorities
To add sources or to suggest topics for source material, please e-mail me [Mordechai Torczyner] at: 
. All submissions are welcome and encouraged, and will be credited!
