Matthew Poole and continuators on Hebrews 13:18

18 Pray for us: For we trust we have a good Conscience, in all things willing to live honestly.

The closing Duty becoming the Subjects of the Kingdom of Christ, is Prayer, upon some special accounts, v. 18, 19. that they would with their renewed Souls, influenced and assisted by the Spirit of Grace and Supplication, pour forth their Desires to God with Faith, Fervency, and Importunity for his vouchsafing to the Apostle himself, for their spiritual Guides and Rulers, that the things they need, and God hath promised to them, as to their successful Course of their Ministry, may be bestowed on them, which the Spirit specifieth elsewhere, 2 Cor. 3.5, 6. Ephes. 6.18, 19, 20. Col. 4.3, 4. 2 Thess. 3.1, 2.

He urgeth this on them, for that he was a fit Subject to be prayed for, whatever any might accuse, or charge him for rejecting Iudaism out of Singularity, Prejudice, or some evil Design; he assures them from the Spirit of God, that he had a rightly informed Conscience, by God's Word, and which testified his Innocency and Sincerity, and which did dictate and influence him to be communicating and promoting with all, and to all the Truth of the Gospel; and that his own Life and Conversation in the World was agreeable to the Gospel-rule, in all Godliness and Honestly, Acts 23.1. and 24.14. comp. 1 Cor. 4.4. 2 Cor. 1.12.