God has poured out over us grace upon grace (John 1:16). We are to give back to the Lord the first fruits of our treasure in thanksgiving and gratitude. We are to strive for the biblical standard: ten percent.
Though none of us is required to do so, the Lord God tells us of the blessings we will receive if we freely give to Him from our bounty:
"Bring the full tenth into the storehouse so that there may be food in my house. Test me in this way,” says the Lord of Armies. “See if I will not open the floodgates of heaven and pour out a blessing for you without measure."
Malachi 3:10 (CSB)