Peter therefore was kept in prison: but prayer was made without ceasing of the church unto God for him.
For God is my witness, whom I serve with my spirit in the gospel of his Son, that without ceasing I make mention of you always in my prayers;
1 Thessalonians 5:17
Pray without ceasing.
2 Timothy 1:3
I thank God, whom I serve from my forefathers with pure conscience, that without ceasing I have remembrance of thee in my prayers night and day;