“And Jesus answering saith unto them, Have faith in God.”
Mark 11:22

“…but shall believe that those things which he saith shall come to pass…” (Mark 11:23)
In refusing to doubt, you must believe that THOSE THINGS YOU SAID shall come to pass, this is why being specific and keeping things simple is so important. He channels your heart to what you should believe and hold on to after you’ve spoken- believe and hold on to what YOU SAID, don’t adjust it for something bigger or smaller, if you do so the Bible says you wouldn’t get the original, the bigger or the smaller, infact you could be disappointed unto ruin, because he says you’d be tossed:
“But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed. For let not that man think that he shall receive any thing of the Lord.” James 1:6-7
Also, don’t say one thing but believe something else would happen, just like Jesus didn’t curse the tree but secretly believed the next day he’d find fruit on it.

Bible Reading Plan: Ezekiel 26 and Titus 2