Genesis 24:15

15.Before he had done speaking. The sequel sufficiently demonstrates that his wish had not been foolishly conceived. For the quickness of the answer manifests the extraordinary indulgence of God, who does not suffer the man to be long harassed with anxiety. Rebekah had, indeed, left her house before he began to pray; but it must be maintained that the Lord, at whose disposal are both the moments of time and the ways of man, had so ordered it on both sides as to give clear manifestation of his Providence. For sometimes he keeps us the longer in suspense, till, wearied with praying, we may seem to have lost our labor; but in this affair, in order that his blessing might not seem doubtful, he suddenly interposed. The same thing also happened to Daniel, unto whom the angel appeared, before the conclusion of his prayer. (Daniel 9:21.) Now, although it frequently happens that, on account of our sloth, the Lord delays to grant our requests, it is, at such times, expedient for us, that what we ask should be delayed. In the meantime, he has openly and conspicuously proved, by unquestionable examples, that although the event may not immediately respond to our wishes, the prayers of his people are never in vain: yea, his own declaration, that before they cry he is mindful of their wants, is invariably fulfilled. (Isaiah 65:24.)