Thank you for your question about Paul’s ministry.
As one reads the personal letters to Timothy and Titus, the Apostle Paul encouraged his coworkers to be faithful to the Lord and to fulfill their ministry. He shared his testimony of God’s faithfulness and the reward that awaits him and them.
His words to the Ephesians Elders may well be a template of his words when he left a group of believers. He prayed with and for them.
One may review God’s working in and through them, one’s integrity and work among them, and taking time to pray with them. It is passing the work of the Lord to another servant of the Lord.
SUMMARY: Paul constantly prayed for the churches and servants of the Lord. What an encouragement for the believers to know that the former pastor still prays for them even though he has moved onto a new ministry.
For further insight and discussion: