http://revach.net/article.php?id=3609

Section: Parshas HaShavua   Category: Quick Vort
Parshas Tzav: Rav Moshe Shmuel Shapira - Money Is Very Precious
When commanding Bnei Yisrael to bring the Korban Tamid every day, the Pasuk says, "Tzav Es Aharon;" (Tzav 6:2) Command Aharon."  Rashi says that the word Tzav is used to rally the people in a situation where there is Chesaron Kis, it will cost them money.  Rav Moshe Shmuel Shapira asks, "Since the Korban Tamid was paid for by all of Klal Yisrael it was a negligible sum for each person.  For a paltry sum do you really need to rally the people?
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Rav Moshe Shmuel answers that Hashem imbued a person's nature with a resistance to parting with his money, and this is the way it should be.   Chazal tell us that tzadikim valued their money more than their own body, like we see by Yaakov who risked his life to cross the river at night to save his small utensils.  Why is this?  Every cent a person acquires in this world takes time, and time is most precious of all, especially for a tzadik.  Someone who does not value money and throws it away, spending foolishly, shows a great disregard for his time.

Rav Elchonon Wasserman and the Ponevezher Rav in their younger years learned together in Radin, the Yeshiva of the Chofetz Chaim.  One time they needed to look up a sefer quoted by the Chofetz Chaim in one of his works.   Since the Yeshiva did not have the sefer they went to the Chofetz Chaim's house to ask if they can see the sefer.  The Chofetz Chaim said he did not have it.  When he needed to quote it, he borrowed it from someone else and then returned it.  Then, the Chofetz Chaim turned to his seforim shelf and let out a "krechtz".  "Probably Rebbi is krechtzing because he does not own the sefer," said the Ponevezher Rav.  "No," said the Chofetz Chaim.  "I am krechtzing looking at the seforim and thinking maybe I have one that I don't need and it cost me money.  Money is time and that would be a waste of precious time!"