Men ought always to pray, and not to faint. Luke 18:1
Pray without ceasing; 1Thess 5:17
He prayed more earnestly: and his sweat was as it were great drops of blood falling down to the ground Luke 22:44
Elias was a man subject to like passions as we are, and he prayed earnestly that it might not rain: and it rained not on the earth by the space of three years and six months. James 5:17.
There are no specific time for prayers, the word of God say, "Pray without season" both in the morning, noon day, Even time and at mid-night