Charles Grandison Finney said this quote
“ When God has specially promised the thing, we are bound to believe we shall recieve it when we pray for it. You have no right to put in an 'if', and say, 'Lord, if it be thy will... This is to insult God. To put an 'if' in God's promise when God has put none there, is tantamount to charging God with being insincere. ”