These passages specifically reference tithing. For more on what the prophets have said about finance, see this document:
-“Obedience to God’s commandments is the foundation for a happy life. Surely we will be blessed with the gifts of heaven for our obedience. Failure to pay tithing by those who know the principle can lead to heartache in this life and perhaps sorrow in the next.” (Joseph B. Wirthlin; Conf. Report 2004 “Earthly Debts, Heavenly Debts” https://www.lds.org/general-conference/2004/04/earthly-debts-heavenly-debts?lang=eng&clang=tam)
-“...tithing is a debt which everyone owes to the Lord for his use of the things that the Lord has made and given to him to use. It is a debt just as literally as the grocery bill, or a light bill, or any other duly incurred obligation. As a matter of fact, the Lord, to whom one owes tithing, is in a position of a preferred creditor. If there is not enough to pay all creditors, he should be paid first.” (Marion G. Romney: Conf. Report Jan. 1982 “The Blessings of an Honest Tithe” https://www.lds.org/new-era/1982/01/the-blessings-of-an-honest-tithe?lang=eng)
-“The payment of tithing is a commandment, a commandment with a promise. If we obey this commandment, we are promised that we will ‘prosper in the land.’ This prosperity consists of more than material goods—it may include enjoying good health and vigor of mind. It includes family solidarity and spiritual increase. I hope those of you presently paying your full tithe
will seek the faith and strength to do so. As you discharge this obligation to your Maker, you will find great, great happiness, the like of which is known only by those who are faithful to this commandment.” (N. Eldon Tanner; The Gospel and the Productive Life Teacher Manual Religion 150, (2004), 15–20; https://www.lds.org/manual/the-gospel-and-the-productive-life-teacher-manual-religion-150/managing-financial-resources-wisely?lang=eng)
-“One of the greatest lessons I have learned, …is that people who pay their tithing in both difficult times and good times get along better. They simply have fewer problems; there are fewer family problems and fewer financial problems. Their outlook is more positive, their ability to do and function is increased, and they prosper spiritually as well as temporally.”(James E Faust; Aug. 1984 Doing the best things in the Worst Times; https://www.lds.org/ensign/1984/08/doing-the-best-things-in-the-worst-times?lang=eng)
-“One of life’s paradoxes is that a person who approaches everything with a what’s-in-it-for-me attitude may acquire money, property, and land, but in the end will lose the fulfillment and the happiness that a person enjoys who shares his talents and gifts generously with others.” (James E Faust; Conf. Report Oct. 2002 What’s In It For Me? https://www.lds.org/general-conference/2002/10/whats-in-it-for-me?lang=eng)
-“With all my heart…I plead with the Latter-day Saints to live honestly with the Lord in the payment of tithes and offerings…There has been laid upon the Church a tremendous responsibility. Tithing is the source of income for the Church to carry forward its mandated activities.” (Gordon B. Hinckley; Conf. Report April 1982 Tithing: An Opportunity to Prove Our Faithfulness; https://www.lds.org/general-conference/1982/04/tithing-an-opportunity-to-prove-our-faithfulness?lang=eng)
-Elder Gerald Lund wrote in his book Divine Signatures: God is so good to us: we don’t pay tithing for the songs of the birds, or for the sunshine. God created the earth, (“The earth is the Lords, and the fullness thereof.” (1 Cor. 10:26; Ps. 89:11)) We pay tithing for something, just 10%, and the Lord returns to us great dividends. It’s a sure investment. For instance, if we eat healthy foods like the word of wisdom says, that is like a tithe which gives us health throughout the rest of the day. Scientists say exercising 45 minutes a day for 5-6 days a week is all that is needed to maintain our health. That is a small tithe, a small investment, with great reward.
-President Heber J Grant used to speak of a story of a man asked to give a ham to a church function. He heard a voice say “pick the small ham, they’ll never know the difference”. He said “shut up Mr. Devil, or I’ll give 2 hams!” (cited in Truman G Madsen “Presidents of The Church” lectures)
-we live the law of tithing as a preparatory law. We are getting ready for the full law: The law of consecration.
-Mary Fielding Smith ? went to pay her tithing, the receiver of it said she should not pay, as she is so poor. She said that he should be ashamed of himself, that
-Joseph Smith said that a religion which does not require us to give our all can’t qualify us for salvation.
-A man had ten apples, and wanted to tithe, but not too much. He said “I’ll throw one apple up, and if you like, you can take a bite out of it”