In this passage of Scripture, God actually invites people to try (prove) Him—to verify His trustworthiness with their giving. He has given us a “fool-proof” test of His faithfulness! But it first requires a step of faith on our part.
He says that by disobeying Him in the tithe, we rob Him of the privilege of pouring out great and overflowing blessings. He calls for renewed giving with these promises.
First, there will be “food” or resources for God’s work (“in My house”).
Second, He says those who give will be placed m a position to receive great, overflowing blessings. Our obedience releases His faithfulness! You will experience the windows of heaven actually opening with blessings you will not be able to receive or contain!
Third, God says that He will “rebuke the devourer” for your sakes. He will cause every blessing that has your name written on it to be directed to you, and Satan himself cannot stop it.
Do not be afraid to try God with your giving. He is God and He will stand the test every time.