Giving : Tithe/Offering

What does the Bible say about tithing?

"Bring the whole tithe into the storehouse, that there may be food in my house. Test me in this, says the Lord Almighty, and see if I will not throw open the floodgates of heaven and pour out so much blessing that there will not be room enough to store it."
- Mal. 3:10

What does the bible say about offerings?

"...Whoever sows sparingly will also reap sparingly, and whoever sows bountifully will also reap bountifully. Each one must give as he has decided in his heart, not reluctantly or under compulsion, for God loves a cheerful giver."
- 2 Cor. 9:6-7