And Jesus answered them, Truly I say to you, if you have faith (a firm relying trust) and do not doubt, you will not only do what has been done to the fig tree, but even if you say to this mountain, Be taken up and cast into the sea, it will be done. And whatever you ask for in prayer, having faith and [really] believing, you will receive.”
‭‭Matthew‬ ‭21:21-22‬ ‭AMPC‬‬

When the Bible talks of having faith it means having faith in what Jesus Christ has already done our behalf and not having faith in your own faith. Many do doubt God, because they are having faith in their own faith. Whenever God speaks, He is not depending on our ability to bring His word to pass, but He is counting on Himself. That means believing or not does not change the word which is gone out of the mouth of God.

If we are faithless [do not believe and are untrue to Him], He remains true (faithful to His Word and His righteous character), for He cannot deny Himself.”
‭‭2 Timothy‬ ‭2:13‬ ‭AMPC‬‬

He does not change His mind. We are the ones that change because we don’t trust him.

Accordingly God also, in His desire to show more convincingly and beyond doubt to those who were to inherit the promise the unchangeableness of His purpose and plan, intervened (mediated) with an oath. This was so that, by two unchangeable things [His promise and His oath] in which it is impossible for God ever to prove false or deceive us, we who have fled [to Him] for refuge might have mighty indwelling strength and strong encouragement to grasp and hold fast the hope appointed for us and set before [us].”
‭‭Hebrews‬ ‭6:17-18‬ ‭AMPC‬‬

That is why we don’t have to doubt God. He never changes or will His change His mind towards us. His word is already gone ahead of us. And He Himself is subjected to His word. Thus, whenever He says something that is what He will do.

For as the rain and snow come down from the heavens, and return not there again, but water the earth and make it bring forth and sprout, that it may give seed to the sower and bread to the eater, [II Cor. 9:10.] So shall My word be that goes forth out of My mouth: it shall not return to Me void [without producing any effect, useless], but it shall accomplish that which I please and purpose, and it shall prosper in the thing for which I sent it.”
‭‭Isaiah‬ ‭55:10-11‬ ‭AMPC‬‬

No need to doubt!!!!!!

Let’s pray together: Heavenly Father, I thank You for Your Word. I bind the spirit of doubt and loose faith in my life in Jesus name. Amen