Pious Person (Chasid): Berachot 18b; Temurah 15b; R. Pesachim 40a
Pious person of the generation (Chasid sheb'dor): Taanit 8a
Chachamim [Wise People] vs. Chasidim [Pious People]: Shabbat 121b
Considering the Pious to be above the level of Judges: Moed Katan 17a
Differentiating between one who is righteous, and one who is perfectly righteous: Berachot 7b; Megillah 6b
Eshkol - A Person with Everything: Torah, Awe of Heaven and Generosity: Temurah 15b
The "Eshkol" people - People with Everything, Torah, Awe of Heaven and Generosity - learned Torah like Moshe himself: Temurah 15b
Whether there was any flaw in the "Eshkol" people: Temurah 15b-16a
The righteous are called "Myrtles": Megillah 13a
Righteous people are those who do Gd's will: Megillah 15b
Righteous people are those who keep their splendor hidden: Megillah 15b
Righteous people are those who make themselves like "remainders" next to what Gd wants: Rosh HaShanah 17b; Megillah 15b
Righteous people are those who judge their own inclinations: Megillah 15b
Righteous people are those who judge honestly: Megillah 15b
Righteous people are those who conquer their own inclinations: Megillah 15b
Righteous people are those who debate in Torah: Megillah 15b
Righteous people are those who wake early and stay late in the Study Hall: Megillah 15b
Righteous people are those who wake early and stay late in the Synagogue: Megillah 15b
Righteous people speak less and act more: Nedarim 21b
Practices of Pious People
Those who follow the words of the Sages are called "Tzanua [modest]": Niddah 12a
How they tried to make up for not being able to bring Sin Offerings, as Gd wouldn't let them sin in error: Nedarim 10a
Not soaking wheat on Pesach, although it takes a long time to soften: Pesachim 40a
Returning someone's items after saving them from a fire on Shabbat: Shabbat 120a
Not killing dangerous creatures on Shabbos, if they aren't currently menacing: Shabbat 121b
Burying or burning nails after cutting them: Moed Katan 18a
In the verses of the "Musaf" prayer of Rosh HaShanah: Rosh HaShanah 32b
Rushing to put Tzitzit-Fringes on garments, before theiur completion: Menachot 40b, 41a
Pious people are more stringent with themselves: Menachot 41a
Their conduct in having consecutive sexual relations without checking for menstrual blood in between: Niddah 16b
Causing physical suffering for themselves: Eruvin 18b
Practicing two opposite strictures in a case of doubt: Beitzah 4b
Going Beyond the Law - Lifnim miShurat haDin
Being lenient for others, but strict in one's own practice: Berachot 22a
General source for practicing more than the law demands: Bava Metzia 30b
A reward for transcending our obligations: Berachot 20b
In Loading another's Animal: Bava Metzia 30b
In Returning a Lost Object: Bava Metzia 24b
In thanking Gd for food: Berachot 20b
Refusing to eat in another's home, because of evidence that the food may have been prepared improperly: Beitzah 14b
Gd and the Righteous
Gd will not allow sin to come to the righteous, even to the animals of the righteous: Ketuvot 28b; Nedarim 10a; Gittin 7a
Gd judges the righteous strictly: Sotah 13b; Bava Metzia 33b
Gd gives the righteous their full years of life, to the day: Sotah 13b