Prov 3:9-10, “9Honour the Lord with thy substance, and with the firstfruits of all thine increase: 10So shall thy barns be filled with plenty, and thy presses shall burst out with new wine.”
The Hebrew word translated firstfruits is Reshiyth (pronounced ray-sheet) which means the first, in place, time, order or rank (spec. a firstfruit):-beginning, chief (-est), first (-fruits, part, time), principal thing. This is the principle of first things first. The idea is to put God first before you or anything else in acknowledgement of the fact that He is your source and all in all.
When you do this, you provoke the flow of financial abundance towards your life. You cannot put God first and come last. God honours those who honour him.