The following is from thewestminsterstandard.org:
Q. 98. What is prayer?A. Prayer is an offering up of our desires unto God, for things agreeable to his will, in the name of Christ, with confession of our sins, and thankful acknowledgment of his mercies.
Ps. 62:8; 1 John 5:14; John 16:23; Ps. 32:5-6; Dan. 9:4; Phil. 4:6.
Q. 99. What rule hath God given for our direction in prayer?
A. The whole Word of God is of use to direct us in prayer, but the special rule of direction is that form of prayer which Christ taught his disciples, commonly called, The Lord’s Prayer.
1 John 5:14; Matt. 6:9-13 with Luke 11:2-4.
Q. 100. What doth the preface of the Lord’s Prayer teach us?
A. The preface of the Lord’s Prayer, which is, Our Father which art in heaven,” teacheth us to draw near to God with all holy reverence and confidence, as children to a father, able and ready to help us; and that we should pray with and for others.
Matt. 6:9; Rom. 8:15; Luke 11:13; Acts 12:5; 1 Tim. 2:1-2.