More sources:
Magen Avraham O.C. 2:3,
Baer Heitev 2:2,
Yosef Ometz 578, page 123,
Siddur Yaavetz page 87, 2,
Ben Ish Chai Pinchas 2:18,
Kitzur Shulchan Aruch 3:5,
Mishnah Berurah 2:2,
Kaf HaChaim 2:26,
Me’Asaf Lechol Hamachanos 2:12,
Kav Hayashar 46, pages 220-221, see Eishel Avraham Butchatch 2.
From pg24, HaRav Yisroel Belsky, shlit”a compiled by Rabbi Moshe Dovid Lebovits
PDF online
Title: Piskei Halacha
Ch 1.”Actions That Cause Forgetfulness of Torah (Kasheh L’shikchah)”
See pgs 23-24