Psalm 119:164 NIV
164 Seven times a day I praise You
for Your righteous laws.
—those common hours, I mean, which mark the intervals of the day—the third, the sixth, the ninth (9 AM, Noon, and 3 PM) —which we may find in the Scriptures to have been more solemn than the rest.
~ Tertullian, Early Church father
Psalm 55:17 NIV
17 Evening, morning and noon
I cry out in distress,
and He hears my voice.
Daniel 6:10 NLT
10 But when Daniel learned that the law had been signed, he went home and knelt down as usual in his upstairs room, with its windows open toward Jerusalem. He prayed three times a day, just as he had always done, giving thanks to his God.
Acts 3:1 NIV
3 One day Peter and John were going up to the Temple at the time of prayer—at three in the afternoon.
Acts 2:15 NIV
15 These people are not drunk, as you suppose. It’s only nine in the morning!
Acts 10:9-10 NIV
9 About noon the following day as they were on their journey and approaching the city, Peter went up on the roof to pray. 10 He became hungry and wanted something to eat, and while the meal was being prepared, he fell into a trance.
Acts 10:1-3 NIV
10 At Caesarea there was a man named Cornelius, a centurion in what was known as the Italian Regiment. 2 He and all his family were devout and God-fearing; he gave generously to those in need and prayed to God regularly. 3 One day at about three in the afternoon he had a vision. He distinctly saw an angel of God, who came to him and said, “Cornelius!”
4 Cornelius stared at him in fear. “What is it, Lord?” he asked.
The angel answered, “Your prayers and gifts to the poor have come up as a memorial offering before God. 5 Now send men to Joppa to bring back a man named Simon who is called Peter.
Acts 10:30 NIV
30 Cornelius answered: “Three days ago I was in my house praying at this hour, at three in the afternoon. Suddenly a man in shining clothes stood before me.
Section VII – Didache
1. Let not your fasts be with the hypocrites, for they fast on Mondays and Thursdays, but do you fast on Wednesdays and Fridays.
2. And do not pray like the hypocrites, but as the Lord commanded in His Gospel, pray like this: “Our Father, in Heaven, holy be Your Name, Your Kingdom come, Your will be done, on earth as it is in Heaven; give us today our daily bread, and forgive us our debt as we forgive our debtors, and lead us not into temptation, but deliver us from the Evil One, for Yours is the kingdom, and the power and the glory for ever.”
3. Pray like this three times a day.