Q.What did God command us to pray for?
A.  Everything we need, spiritually and physically, as embraced in the prayer Christ our Lord himself taught us.

James 1:17; Matt. 6:33

Q. 138  What is this prayer?
A.  Our Father in heaven,hallowed be your name, your kingdom come, your will be done on earth as it is in heaven. Give us today our daily bread. Forgive us our debts, as we also have forgiven 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 forever. Amen.
Matt. 6:9-13; Luke 11:2-4

Q. 139. Are Christians tied to this very Form of Prayer?

A. We are not. Our Lord here delivers to his Church a brief Summary of those things which we are to ask of God, but yet Christ also expects us to ask for particular benefits. This form a set of general topics, under which all benefits may be grouped. All particulars of Prayer must agree & correspond with this general form, although we are not tied to this from. This is apparent from Jam. 1.5. where the Apostle exhorts the Saints, if any of them  lack wisdom, they should ask of God, who gives liberally to all, but these words are not found in the form of prayer particularly expressed. In addition, we have examples of prayer both in the Old and New Testament, which do not exactly follow this form although all they asked was included in this prayer.