16:21 With my own hand - What precedes having been wrote by an amanuensis.

1 Corinthians 16:21 Parallel Commentaries

"And Watch unto Prayer. "
1 Pet. iv. 7.--"And watch unto prayer." "Watch." A Christian should watch. A Christian is a watchman by office. This duty of watchfulness is frequently commanded and commended in scripture, Matt. xxiv. 42, Mark xiii. 33, 1 Cor. xvi. 13, Eph. vi. 18, 1 Pet. v. 8, Col. iv. 2; Luke xii. 37. David did wait as they that did watch for the morning light. The ministers of the gospel are styled watchmen in scripture and every Christian should be to himself as a minister is to his flock, he should watch over …
Hugh Binning—The Works of the Rev. Hugh Binning

For if they be Urged from the Gospel that they Should Put Nothing By...
31. For if they be urged from the Gospel that they should put nothing by for the morrow, they most rightly answer, "Why then had the Lord Himself a bag in which to put by the money which was collected? [2572] Why so long time beforehand, on occasion of impending famine, were supplies of corn sent to the holy fathers? [2573] Why did Apostles in such wise provide things necessary for the indigence of saints lest there should be lack thereafter, that most blessed Paul should thus write to the Corinthians …
St. Augustine—Of the Work of Monks.

Ephesus
While Apollos was preaching at Corinth, Paul fulfilled his promise to return to Ephesus. He had made a brief visit to Jerusalem and had spent some time at Antioch, the scene of his early labors. Thence he traveled through Asia Minor, "over all the country of Galatia and Phrygia" (Acts 18:23), visiting the churches which he himself had established, and strengthening the faith of the believers. In the time of the apostles the western portion of Asia Minor was known as the Roman province of Asia. Ephesus, …
Ellen Gould White—The Acts of the Apostles