Reflecting on Psalm 108:7, Charles Spurgeon wrote the following:

THERE is an old promise, concerning God’s people, which says, “Before they call, I will answer; and while they are yet speaking, I will hear.” This text is one of the instances in which the Lord has dealt with his saints upon the lines of that promise. Read the preceding verse. David there prays, “Save with thy right hand, and answer me;” and while he is waiting for God to answer him, he remembers that God has already spoken. In effect, he says to himself, “I am waiting for an answer, but God has given it to me.” Very often, the response to a believer’s petition has been practically received before he presents his request, and he only needs that God should open his eyes for him to see that, before he called, God had answered his supplication. Indeed, brethren and sisters in Christ, in one sense, all your prayers — that is, your prayers that ought to be answered, — are already answered; for, whatsoever there may be that you may rightly ask of God, you really have it, since, in giving us Christ, he has already given us all things. An important part of the duty of faith is to believe that you have what you ask in prayer, and then you shall have it. This is blessed philosophy; may we all learn it! Oftentimes, when we are crying to God, and waiting for an answer to our petition, if we did but look around us, and if we had more acute powers of observation — if our spiritual faculties were keener and quicker, we should perceive that we already have the very thing for which we are asking. Some of you have, perhaps, been saying, “Oh, that we were indeed the Lord’s people, who have their prayers answered even before they offer them! Well, then, turn to the Book, and you will find that the Lord has there told you that you are his if, indeed, you are believing in his Son, our Lord and Savior Jesus Christ. God has given you, by that most sure word of testimony, the clearest possible evidence of your personal interest in Christ already. If you are asking for some further kind assuring word, to soothe your fears to rest, turn to the Bible, for there is in it the very word you need. So, seek it out, for I may truly say of God’s revelation in this blessed Book, —

“What more can he say than to you he hath said, You who unto Jesus for refuge have fled”

This leads me to the practical remark that, possibly, the very thing that you have been praying for so long, you may already have obtained; and God may not intend you to pray any longer about it, but may say to you, as he did to Moses, ‘Wherefore criest thou unto me? Speak unto the children of Israel, that they go forward.’ Believe that you have the blessing for which you are asking, and go forward in that belief. The time for praying about it has passed; this is the time for grasping the blessing by faith, and using it to my praise and glory.” So it seems to me, in our text, that David had prayed, and then suddenly recollected that he had already received the very thing for which he had asked. So he shakes himself from the dust, and cries, confidently and jubilantly, “God hath spoken in his holiness; I will rejoice, I will divide Shechem, and mete out the valley of Succoth.”