1 Timothy 5:18

The Scripture saith. See De 25:4.

Thou shalt not muzzle the ox.

See PNT 1Co 9:9.

The labourer [is] worthy of his reward. Quoted from Lu 10:7. Paul says it is Scripture. Therefore, Luke's Gospel was already written and in Paul's hands when this Epistle was written. He calls this Gospel "Scripture". Peter applies the same term to Paul's writings (2Pe 3:16).
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