ISB ~ 1 Corinthians 9 v9

You shall not muzzle an ox:A reference to Deut 25:4. • As Deuteronomy grants oxen the right to eat some of the grain that is processed by their work, so Christian laborers can rightly expect material support from the churches they tend to (1 Tim 5:18). This is one of many examples where Paul draws spiritual significance out of the OT that goes beyond the literal and historical meaning of the passage and applies it to a new situation in the Church (1 Cor 10:1-6; Gal 4:22-25; CCC 117).