I know what it is like to hunt for the Scriptures on giving, and since I have been studying this topic off and on over a number of years I've collected some favourites. There are plenty more, but these are ones I've studied and I've written articles on most of them. You'll notice that 2 Corinthians chapters 8 and 9 are very much on the theme of giving and generosity. May these Scriptures on giving be of help to you too.
2 Corinthians 8:2
2 Corinthians 8:3-5
2 Corinthians 8:7
2 Corinthians 8:8
2 Corinthians 8:10-11
2 Corinthians 8:12
2 Corinthians 8:13
2 Corinthians 8:20-21
2 Corinthians 9:2
2 Corinthians 9:6-7
2 Corinthians 9:8, 10,11
2 Corinthians 9:12-15
"If one of your countrymen becomes poor and is unable to support himself among you, help him as you would an alien or a temporary resident, so he can continue to live among you. Do not take interest of any kind from him, but fear your God, so that your countryman may continue to live among you. You must not lend him money at interest or sell him food at a profit." (Leviticus 25:35-37)
"So when you give to the needy, do not announce it with trumpets, as the hypocrites do in the synagogues and on the streets, to be honoured by men. I tell you the truth, they have received their reward in full. But when you give to the needy, do not let your left hand know what your right hand is doing, so that your giving may be in secret. Then your Father, who sees what is done in secret will reward you." (Matthew 6:2-4).
Out of the most severe trial, their overflowing joy and their extreme poverty welled up in rich generosity. (2 Corinthians 8:2)
For I testify that they gave as much as they were able, and even beyond their ability. Entirely on their own, they urgently pleaded with us for the privilege of sharing in this service to the saints. And they did not do as we expected, but they gave themselves first to the Lord and then to us in keeping with God's will. (2 Corinthians 8:3-5)
"But just as you excel in everything - in faith, in speech, in knowledge, in compete earnestness, and in your love for us - see that you also excel in this grace of giving." (2 Corinthians 8:7)
And God is able to make all grace abound to you, so that in all things at all times, having all that you need, you will abound in every good work. (2 Corinthians 8:8)
Now he who supplies seed to the sower and bread for food will also supply and increase your store of seed and will enlarge the harvest of your righteousness. You will be made rich in every way so that you can be generous on every occasion, and through us your generosity will result in thanksgiving to God. (2 Corinthians 8:10-11).
"For if the willingness is there, the gift is acceptable according to what one has, not according to what he does not have." (2 Corinthians 8:12).
Our desire is not that others might be relieved while you are hard pressed, but that there might be equality. (2 Corinthians 8:13)
"We want to avoid any criticism of the way we administer this liberal gift. For we are taking pains to do what is right, not only in the eyes of the Lord, but also in the eyes of men." (2 Corinthians 8:20-21)
"For I know your eagerness to help, and I have been boasting about it to the Macedonians, telling them that since last year you were ready to give; and your enthusiasm has stirred most of them to action." (2 Corinthians 9:2)
"Whoever sows sparingly will also reap sparingly, and whoever sows generously will also reap generously. Each man should give what he has decided in his heart to give, not reluctantly or under compulsion, for God loves a cheerful giver." (2 Corinthians 9:6-7)
"And God is able to make all grace abound to you, so that in all things at all times, having all that you need, you will abound in every good work. Now He who supplies seed to the sower and bread for food will also supply and increase your store of seed and will enlarge the harvest of your righteousness. You will be made rich in every way so that you can be generous on every occasion, and through us your generosity will result in thanksgiving to God." (2 Corinthians 9:8, 10,11)
"This service you perform is not only supplying the needs of God's people but is also overflowing in many expressions of thanks to God. Because of the service by which you have proved yourselves, men will praise God for the obedience that accompanies your confession of the gospel of Christ, and for your generosity in sharing with them and with everyone else. And in their prayers for you their hearts will go out to you, because of the surpassing grace God has given you. Thanks be to God for his indescribable gift!( 2 Corinthians 9:12-15)