Pious Person (Chasid): Berachot 18b; Temurah 15b; Keritot 25a; Rashi Pesachim 40a
Pious person of the generation (Chasid sheb'dor): Taanit 8a
A pious person is trusting: R. Bava Metzia 68a "teinach":
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 - midat chassidut, or acts of a baal nefesh
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
Granting a purchaser extra time to return an item he purchased: Bava Metzia 52b
Investing in such a way that one's partner will receive a profit, while I will have greater exposure to loss (karov l'hefsed, rachok l'schar): Bava Metzia 70a
A special trait of piety [mitzvat parush] in staying away from consuming certain kinds of blood which might otherwise be permitted: Keritot 21b-22a
A special trait of pious people [chassidim] to bring a korban asham taluy - an offering for uncertain guilt daily, to atone for any unknown sins: Keritot 25a
Going Beyond the Law - Lifnim miShurat haDin
Being lenient for others, but strict in one's own practice: Berachot 22a
General sources for practicing more than the law demands: Bava Metzia 30b, 83a
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 Rabbah bar bar Chanah's indigent porters broke his wine barrel carelessly, and he confiscated their cloaks in payment. Rav made him return the cloaks and pay their wages, to transcend his legal obligations [lifnim mishurat hadin]: Bava Metzia 83a
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