EXCERPTS FROM "ON PRAYER" BY TERTULLIAN
Chapter 23. Of Kneeling
...Similarly, too, in the period of Pentecost; which period we distinguish by the same solemnity of exultation. But who would hesitate every day to prostrate himself before God, at least in the first prayer with which we enter on the daylight?
At fasts, moreover, and Stations, no prayer should be made without kneeling, and the remaining customary marks of humility; for (then) we are not only praying, but deprecating, and making satisfaction to God our Lord.
Touching times of prayer nothing at all has been prescribed, except clearly "to pray at every time and every place."
Chapter 24. Of Place for Prayer
But how "in every place," since we are prohibited (from praying) in public?
In every place, he means, which opportunity or even necessity, may have rendered suitable: for that which was done by the apostles (who, in jail, in the audience of the prisoners, "began praying and singing to God") is not considered to have been done contrary to the precept; nor yet that which was done by Paul, who in the ship, in presence of all, "made thanksgiving to God."
Chapter 25. Of Time for Prayer
Touching the time, however, the extrinsic observance of certain hours will not be unprofitable—those common hours, I mean, which mark the intervals of the day—the third, the sixth, the ninth—which we may find in the Scriptures to have been more solemn than the rest.
The first infusion of the Holy Spirit into the congregated disciples took place at "the third hour." Peter, on the day on which he experienced the vision of Universal Community, (exhibited) in that small vessel, had ascended into the more lofty parts of the house, for prayer's sake "at the sixth hour." -Acts 10:9
The same (apostle) was going into the temple, with John, "at the ninth hour," when he restored the paralytic to his health.
Albeit these practices stand simply without any precept for their observance, still it may be granted a good thing to establish some definite presumption, which may both add stringency to the admonition to pray, and may, as it were by a law, tear us out from our businesses unto such a duty; so that—what we read to have been observed by Daniel also, in accordance (of course) with Israel's discipline—we pray at least not less than thrice in the day, debtors as we are to Three—Father, Son, and Holy Spirit: of course, in addition to our regular prayers which are due, without any admonition, on the entrance of light and of night.
But, withal, it becomes believers not to take food, and not to go to the bath, before interposing a prayer; for the refreshments and nourishments of the spirit are to be held prior to those of the flesh, and things heavenly prior to things earthly.
Chapter 26. Of the Parting of Brethren
You will not dismiss a brother who has entered your house without prayer. —"Have you seen," says Scripture, "a brother? you have seen your Lord;" —especially "a stranger," lest perhaps he be "an angel."
But again, when received yourself by brethren, you will not make earthly refreshments prior to heavenly, for your faith will forthwith be judged. Or else how will you—according to the precept Luke 10:5—say, "Peace to this house," unless you exchange mutual peace with them who are in the house?
Chapter 27. Of Subjoining a Psalm
The more diligent in prayer are wont to subjoin in their prayers the "Hallelujah," and such kind of psalms, in the closes of which the company respond... ______________________________________________