Elijah's prayer for rain,
(1 Kings 18:41-46) "¶ And Elijah said unto Ahab, Get thee up, eat and drink; for there is a sound of abundance of rain. {42} So Ahab went up to eat and to drink. And Elijah went up to the top of Carmel; and he cast himself down upon the earth, and put his face between his knees, {43} And said to his servant, Go up now, look toward the sea. And he went up, and looked, and said, There is nothing. And he said, Go again seven times. {44} And it came to pass at the seventh time, that he said, Behold, there ariseth a little cloud out of the sea, like a man’s hand. And he said, Go up, say unto Ahab, Prepare thy chariot, and get thee down, that the rain stop thee not. {45} And it came to pass in the mean while, that the heaven was black with clouds and wind, and there was a great rain. And Ahab rode, and went to Jezreel. {46} And the hand of the LORD was on Elijah; and he girded up his loins, and ran before Ahab to the entrance of Jezreel."
Elisha prays for his servants vision,
(2 Kings 6:13-18) "¶ And he said, Go and spy where he is, that I may send and fetch him. And it was told him, saying, Behold, he is in Dothan. {14} Therefore sent he thither horses, and chariots, and a great host: and they came by night, and compassed the city about. {15} And when the servant of the man of God was risen early, and gone forth, behold, an host compassed the city both with horses and chariots. And his servant said unto him, Alas, my master! how shall we do? {16} And he answered, Fear not: for they that be with us are more than they that be with them. {17} And Elisha prayed, and said, LORD, I pray thee, open his eyes, that he may see. And the LORD opened the eyes of the young man; and he saw: and, behold, the mountain was full of horses and chariots of fire round about Elisha. {18} And when they came down to him, Elisha prayed unto the LORD, and said, Smite this people, I pray thee, with blindness. And he smote them with blindness according to the word of Elisha."
I'm not going to offer what you should take away from these two examples of prayers offered to THE LORD in full knowledge that He hears. That's for you to decide.
God bless gentlemen.