Genesis 24:63

He went out to meditate (or pray) in the field at the even tide — Some think he expected his servants about this time, and went out on purpose to meet them. But it should seem he went out to take the advantage of a silent evening, and a solitary field, for mediation and prayer. Our walks in the field are then truly pleasant, when in them we apply ourselves to meditation and prayer we there have a free and open prospect of the heavens above us, and the earth around us, and the hosts and riches of both, by the view of which we should he led to the contemplation of the Maker and Owner of all. Merciful providences are then doubly comfortable, when they find us in the way of our duty: some think Isaac was now praying for good success in this affair, and meditating upon that which was proper to encourage his hope in God concerning it; and now when he sets himself, as it were, upon his watch — tower, to see what God would answer him, he sees the camels coming.