Link to Luther's Rogate Sermon -
7. In the fifth place, one should so act in this confidence of prayer as not to limit God and specify the day or place, nor designate the way or measure of the prayer’s fulfillment; but leave all to his own will, wisdom and almighty power. Then confidently and cheerfully await the answer, not even wishing to know how and where, how soon, how long, and through whom. His divine wisdom will find far better ways and measures, time and place, than we can devise, even should we perform miracles. So, in the Old Testament, the children of Israel all trusted in God to deliver them while yet there was no possible way before their eyes, nor even in their thoughts; then the Red Sea parted and offered them a way through the waters, and suddenly drowned all their enemies. Exodus 14.
8. Thus Judith, the holy woman, did when she heard that the citizens of Bethulia wished to deliver the city to their enemies within five days if God, in the meantime, did not help. She reproved them and said, Now who are ye, that have tempted God? They are not designs by which one acquires grace; but they awaken more disgrace. Do you wish to set a time for God to show you mercy, and specify a day according to your own pleasure?
Judith 8:10-12. Then the Lord helped her in a wonderful manner, in that she cut off the head of the great Holofernes and dispersed the enemies.
9. In like manner, St. Paul says that God’s ability is thus proved, in that he does exceeding abundantly above and better than we ask or think. Ephesians 3:20. Therefore, we should know that we are too finite to be able to name, picture or designate the time, place, way, measure and other circumstances for that which we ask of God. Let us leave that entirely to him, and immovably and steadfastly believe that he will hear us.
KJV Ephesians 3:20 Now unto him that is able to do exceeding abundantly above all that we ask or think, according to the power that worketh in us [GJ - dynamo in Greek for power; energy or efficacy for the Greek word for worketh in us - την δυναμιν την ενεργουμενην]
21 Unto him be glory in the church by Christ Jesus throughout all ages, world without end. Amen.