Whether this is part of the service for a korban shelamim, including a korban chagigah and a korban pesach which aged out: Pesachim 96b, 97a; Zevachim 9a
For a korban shelamim on Holidays: Rosh HaShanah 33a; Megillah 5a; Chagigah 7b; Temurah 16a
Whether an heir who inherits an offering performs this, when he brings the offering: Temurah 2a
Whether this practice is performed on a nochri's offering: Temurah 2a
Whether a person performs this practice on another person's offering, if he is bringing it in his friend's place: Temurah 2a
Leaning as a requirement for a korban olah: Zevachim 6a-b
Leaning as a requirement for a korban asham: Zevachim 11a
Leaning as a requirement for the asham of a metzora: Zevachim 33a
Leaning on a korban asham which is brought as a korban olah if its master dies or uses a different animal as his korban asham: Temurah 20b
Leaning as a requirement for sa'ir nachshon - the goats brought by the nesi'im in dedicating the mishkan: Zevachim 48b
Leaning as a requirement for a sin offering for avodah zara: Zevachim 48b
Is leaning a hard and fast requirement, such that its omission would disqualify a korban: Zevachim 39b
The Mechanics of Leaning
At what time of day this is done: Megillah 20b
Whether women do this, too: Eruvin 96a-b; Rosh HaShanah 33a; Kiddushin 36a
Leaning with full strength: Zevachim 33a
How the leaning is conducted, if a group of people are partners in an offering: Temurah 2a How many judges were needed to lean on the bull brought for an error made by the community: Sanhedrin 2a; 3b; 13b
Standing outside the Beit haMikdash, with one's hands on the korban inside the Beit haMikdash: Zevachim 32a-33a
Requiring that leaning be just before shechitah: Zevachim 33a
Disqualifications
Leaning on the korban while impure: Zevachim 32a-b
