Bring ye all the tithes into the storehouse

Russell M. Nelson
"We preach tithing to the poor people of the world because the poor people of the world have had cycles of poverty, generation after generation. That same poverty continues from one generation to another, until people pay their tithing." Russell M. Nelson LDS Prophet, speaking to members in Kenya

The Church of Jesus Christ of Latter-day Saints

Net worth: $40 billion
Bloomberg Businessweek

Annual tithes collected: $7 billion
Business Insider

Annual aid given: $40 million
Deseret News

U.S. land owned: 1 million acres
Business Insider

Landmass of Florida owned: 2%
Orlando Sentinel

Leadership stipend: $120,000
MormonLeaks

Average Kenyan Salary: $912
Reuters

Jeffrey R. Holland
“There is no money in the Church except what our members offer." Jeffrey R. Holland Apostle quoted in the Church News
Deseret News
“Money for the project is not coming from LDS Church members' tithing donations. City Creek Center is being developed by Property Reserve Inc., the church's real-estate development arm, and its money comes from other real-estate ventures." Doug Smeath for the Deseret News
Coins
“If paying tithing means that you can’t pay for water or electricity, pay tithing. If paying tithing means that you can’t pay your rent, pay tithing. Even if paying tithing means that you don’t have enough money to feed your family, pay tithing." César Orellana Salvadoran bishop, quoted in the Ensign, an official church publication
Lynn G. Robbins
“If the Lord expects even the poorest widow to pay her mite, where does that leave all others who find that it is not convenient or easy to sacrifice?” Lynn G. Robbins General Authority, in a churchwide address entitled: Tithing — a Commandment Even for the Destitute
Scriptures
“It is a day of sacrifice, and a day for the tithing of my people; for he that is tithed shall not be burned at his coming.” Doctrine & Covenants 64:23 part of the LDS scriptural canon, dictated by founder Joseph Smith
Handing in a tithing envelope
“Though reasonable efforts will be made globally to use donations as designated, all donations become the Church’s property and will be used at the Church’s sole discretion to further the Church’s overall mission.” Disclaimer on the donation slip used to submit tithes and other offerings
Lorenzo Snow

Lorenzo Snow
fifth president of the Church, on tithing:

"I plead with you in the name of the Lord, and I pray that every man, woman and child who has means shall pay one tenth of their income as a tithing." Conference Report Oct 1899 emphasis added
"I plead with you in the name of the Lord, and I pray that every man, woman and child … shall pay one tenth of their income as a tithing." Teachings of Lorenzo Snow a 2011 lesson manual, part of the Church's official curriculum

Ten percent of all income is mandatory for even the poorest members to receive the rites of the (lavishly ornate) temple.
According to Mormon doctrine, without these ordinances, loved ones cannot be together in the hereafter.

The Church holds families for ransom.
(and abhors financial transparency)