But Elijah went a day's journey into the wilderness, and came and sat down under a juniper tree: and he requested for himself that he might die; and said, It is enough; now, O Lord, take away my life; for I am not better than my fathers. (1 Kings 19:4)
The prophet Elijah, who the day before had prayed for fire to come down from heaven and had succeeded, today was requesting God to kill him. He who had killed 450 prophets of Baal and probably another 400 false prophets with the sword 24-48 hours back, was now in miserable condition. Acute depression had set in, all because queen Jezebel had threatened to kill him. Anyway God did not say "YES" to his request. God had other plans. He thought an angelic intervention might do some good to the downcast prophet. So he sent an angel with some food and water; nothing extravagant, just a cake and some water. Angelic intervention must have been common to Elijah (not like we would respond), so he just ate and drank and went back to sleep. The angel came back a second time and touched him and said, "Get up and eat, for the journey is too great for you." So he got up and ate and drank. Strengthened by that food, he traveled forty days and forty nights until he reached Horeb, the mountain of God. He was NOT A MAN ON A MISSION, he was clueless as to what was happening and needed a fresh revelation of/from God.
Sometimes believers in Jesus Christ also get fed up of life's problems and request God to kill them. But believe me, God has no intentions of answering such prayers. Perhaps he may send you an angel with some food and water or just lift the burden that is overwhelming by the power of his Holy Spirit. SO JUST HANG IN THERE.
Dr. Johnson Cherian