The scripture I just quoted is not good enough?
And he kept back part of the proceeds, his wife also being aware of it, and brought a certain part and laid it at the apostles' feet. 3 But Peter said, "Ananias, why has Satan filled your heart to lie to the Holy Spirit and keep back part of the price of the land for yourself? Acts 5:1-2
This whole operation began when the Holy Spirit was poured out on the day of Pentecost.
As many as are led by the Spirit of God, THESE are the sons of God.
JLB
I don't believe that scripture backs up that every time you give as led by the Holy Spirit you are giving to God. However, I do believe that every time the Holy Spirit leads me to give, and I give accordingly, I am PLEASING God.