As the legally significant quantity for owning/consuming leaven on Pesach: Yoma 79b, Pesachim 50a; Beitzah 2a, 7b
As the legally significant quantity for eating invalid korbanot: Pesachim 50a, 121a
As the legally significant quantity for disqualification of korbanot which leave their designated area: Shabbat 91a-b
As the legally significant quantity for communicating impurity of korbanot which leave their area and pigul - korbanot brought with improper intent: Pesachim 121a
As the minimum amount eligible to communicate death impurity: Shabbat 83b
As the legally significant quantity for [im-]proper consumption of the korban pesach : Pesachim 41a
As the Legal minimum for Bitter Herbs on Pesach: Pesachim 39a
As the minimum amount of an offering, used illegally, to incur death: Pesachim 32b-33a
As the minimum amount of Terumah for which one incurs death upon illegal consumption: Pesachim 33a, 44a
As the minimum size of a korban, for it to be burned on the altar: Pesachim 43b
As the minimum amount of consumed food requiring a communal birkat hamazon [blessings after meals]: Pesachim 49b-50a
As the minimum amount to require that one return to the Beit haMikdash to burn an invalid korban: Pesachim 49a, 49b-50a
As the minimum amount requiring that one return home to destroy leaven before Pesach, instead of Annulling it: Pesachim 49a, 49b-50a
As the minimum amount that will communicate impurity of idolatry: Shabbat 83b
As the minimum amount of Idolatry from which one may not benefit: Shabbat 83b
As the minimum amount of oil of anointing used inappropriately, to trigger liability: Keritot 6b-7a