Matthew 7:7
"Ask [God for something] and it will be given to you; look [to God for something] and you will find it; knock [on the door of opportunity] and it will be opened up to you.
Ephesians 3:20
May there be to God, who is able to do infinitely more [for us] than we could [even] ask or think, according to [His] power at work in us ---
James 5:15-17
And if their prayer is [offered] by faith, [God] will heal the one who is sick, and the Lord will raise him up [from his sickbed]. And if he had sinned, he will be forgiven for them [Note: This may imply that the man's sickness was the result of some sin. In any event, his forgiveness would follow his repentance].
1 John 5:15-16
And if we can be sure that He hears our request for whatever we ask [of Him], we can [also] be certain that we [will] have whatever we have requested from Him.