Verse 1 immediately precedes: Paul urges them in the Lord Jesus, and then reminds them of the instructions through the Lord—directly connected.

Matthew 28:20 records Jesus commanding disciples to teach all he commanded, paralleling Paul's delivery of instructions here.

2 Thessalonians 3:6 gives a command 'in the name of the Lord Jesus Christ,' directly paralleling the apostolic authority claimed here.

2 Thessalonians 3:10 recalls a specific 'rule' Paul gave them, showing the same pattern of authoritative instruction.

In 1 Corinthians 11:23, Paul explicitly says he received from the Lord what he delivered—reinforcing that these instructions came through the Lord Jesus.

2 Thessalonians 3:4 expresses confidence that they obey Paul's commands—the same commands referred to as instructions through the Lord here.

1 Corinthians 11:2 commends the Corinthians for maintaining traditions Paul delivered—just as the instructions here were given through the Lord.