MN 38 The Great Discourse on the Destruction of Craving, MDB p. 349ff.
MN 70 The Discourse at Kitagiri, MDB p. 577ff.
MN 117 The Discourse on the Great Forty, MDB p. 934ff.
MN 121 The Shorter Discourse on Voidness, MDB p. 965ff.
MN = Majjhima-Nikaya
MDB = The Middle Length Discourses of the Buddha, tr. by Nyanamoli & Bodhi (Wisdom).