Zohar, Numbers 3:145: Every individual who has kindness is called an angel of G-d.

Sefer HaChinuch 601: It is a duty to cultivate kindness.

Hosea 10:12: Sow righteousness for yourselves; reap according to lovingkindness.

Jerusalem Talmud Ta'anit 3: Rain falls in the merit of acts of loving-kindness.

Yalkut Ruth 211: Great is the strength of those who perform the acts of lovingkindness...[They are sheltered under] the wings of the Holy One, blessed be He.

Song of Songs Rabbah 5:26, 3: My heart awakes for the practice of loving-kindness.

Yalkut Psalms 874: Acts of loving-kindness are called life.

Avot d'Rabbi Natan 41:11: If you have done a big kindness for your neighbor, let it be in your eyes a small matter.

Isaiah 54:10: For the mountains may move and the hills shake, but My loving-kindness shall never depart from you.

Eishet Chayil: She opens her mouth with wisdom, and a lesson of kindness is on her tongue.

Sefer HaChinuch 33: One should recognize and do kindness to one who has done good to him.

Genesis Rabbah 8: Great are acts of kindness, because if it were not for them. man would not have been created.

Mishnah Peah 1: Acts of kindness are among those things that have no limits.

Exodus Rabbah 1: From here you see the reward of those who perform acts of kindness.  Even though Moses had many names, the only name given to him in the Torah is the one that Batya, the daughter of Pharaoh named him.

Pirkei d'Rabbi Eliezer 12: G-d said, 'More beloved to me are acts of kindness than the sacrifices that Israel will bring before me.'

Hosea 6:6: For I desire kindness and not sacrifice, attachment to G-d rather than burnt offerings.

Jerusalem Talmud: Whoever busies himself with acts of loving-kindness merits sitting in the shadow of G-d.

Shenei Luchot Habrit, pt 2, 27: No one should let a day pass without doing a specific act of lovingkindness, whether by giving money or by personal endeavor.

Genesis Rabbah 96: Jacob said to Joseph, 'If you do for me this kindness after my death, it will be a true kindness.'

Micah 6:8: And what does the L-rd demand of you but to do justice, to love loving-kindness and to walk modestly with your G-d.

Numbers Rabbah 8: Three gifts did G-d give to Israel: people who are merciful, people who are modest and people who perform acts of kindness.

Ethics of the Fathers 1:3: Be like servants who serve their masters not for the sake of receiving a reward.

Megilla 28a: It is said that Job was also generous.  When he bought only a half a perutah's worth of merchandise, he would still leave a whole perutah with the storekeeper.

Bava Batra 145b: 'He that is of a merry heart has a continual feast' - this refers to one who is generous.

Proverbs 22:9: He that has a generous eye shall be blessed.

Ethics of the Fathers 5:11: One who is difficult to anger and easy to appease is pious.

Sefer Ma'alot Hamiddot: Without derech eretz (common decency), we are nothing but a beast of the wilderness.

Mishlei 3:18: Then shalt thou walk in thy way securely, and thou shalt not dash thy foot.

Tov L'Hodot: tell of your kindness in the morning and of your steadfastness by night.

Baruch Hashem Yom Yom: More than any nation He strengthened His lovingkindness over us...

Shir Ha'Yichud: To this very day You grasped my hand, giving life and doing kindness with me.

Chronicles I 16:8-36: As for me, I trust in Your kindness...

Kel Mistater Zemer: O great One of abundant kindness, higher than heaven is Your kindness.

Nishmat Kol Chai Prayer: Your mercy has helped us, and Your kindness has not forsaken us.

Mizmor L'David: May only goodness and kindness pursue me all the days of my life...

Tzur Mishelo Zemer: Be merciful in Your kindness.

Succot 49b: Charity is given only to the living, while loving-kindness may be shown to both the living and the dead.

Succot 49b: Charity is done with one's money, while loving-kindness may be done with one's money or one's person.

Ma Yakar Prayer: How precious is Your kindness, O G-d!

Pesukei DeZimrah Prayer: His kindness endures forever, and from genereation to generation is His faithfulness.

Grace After Meals: ...and for the life, kindness, and mercy, which Thou hast graciously bestowed upon us.

Prayer recited after the study of Mishna for the deceased: for it the gates of mercy and kindness and the gates of the Garden of Eden.

Prayer Upon Donning Tefilin: ...With Your kindness do greatly with me...

Shir Ha'Yichud: I shall recall Your goodness and righteousness, Your kindnesses and mighty deeds.