Faith:

But without faith it is impossible to please him:…(Hebrews 11:6)

Therefore I tell you, whatever you ask in prayer, believe that you have received it, and it will be yours. (Mark 11:24)

Anyone who sacrifices thank offerings to me honors me.
He makes it possible for me to show him
that I am the God who saves.” (Psalm 50:23 NIRV)

After we have asked God to fulfill our request that is according to His Word (for example, healing is according to His Word for God’s Word declares clearly, “…and by His stripes we are healed.”) then we should not have to ask God again and again to answer our prayer, but in faith accept the fact that He has answered (even though we may not see or feel the answer to our prayers) and in faith begin to thank Him for the answer. To ask Him again and again to fulfill our request indicates that we are not asking in faith.