As it is said, And you shall love Hashem your God with all your heart, with all your soul, and with all your might. . . .
And with all your might means with all your wealth. Another interpretation: With all your might means with every measure that he measures out for you, thank him much. —m.Berakhot 9:5
Once Rabbi Israel [Salanter] and his friend Rabbi Mordecai Meltzer were walking through the narrow sidestreets of Vilna. They stopped and entered a synagogue to join in the minchah service. Rabbi Mordecai poured a copious stream of water over his hands while Rabbi Israel [Salanter] by contrast, merely moistened his, hardly using any water at all.
Astonished Rabbi Mordecai blurted out:"Do you not, sir, observe the custom of washing before praying?"
"Indeed, I do," replied Rabbi Israel [Salanter]. "But I see here that the synagogue is frequented by a limited number of worshippers. Visitors do not usually come here. The shamash certainly intended to provide just enough water for the regular worshippers. If we waste a large quantity, the deficiency will be felt by one of the congregants. He will upbraid the shamash and withhold the few pennies he normally gives. And so we will be guilty of denying the shamash his livelihood."
-- The Mussar Movement Volume 1, Part 2, pages 219 - 220
And Jacob uttered a vow, saying, "If God will be with me, and He will guard me on this way, upon which I am going, and He will give me bread to eat and a garment to wear; And if I return in peace to my father's house, and the Lord will be my God; Then this stone, which I have placed as a monument, shall be a house of God, and everything that You give me, I will surely tithe to You.” – Genesis 28:20-22