1 Thessalonians 5:27

I charge you by the Lord that this epistle be read unto all the holy brethren.

Cross-reference

Colossians 4:16 commands public reading of another letter — directly parallels the instruction for all to hear this letter.

1 Timothy 5:21 uses the same solemn 'I charge you in the presence of God' formula, reinforcing the gravity of Paul's commands.

Exodus 24:7 Typology

Exodus 24:7 records Moses reading the book of the covenant aloud to the people — a parallel public reading of God's word.