Deuteronomy 22:10

You shall not plow with an ox and a donkey together.

2 Corinthians 6:14-16

Do not be bound together with unbelievers; for what partnership have righteousness and lawlessness, or what fellowship has light with darkness?

Treasury of Scripture Knowledge

Summary

Thou shalt not plow with an ox and an ass together.

Two different species cannot associate comfortably together, nor pull pleasantly either in cart or plough; and the ass being lower than the ox, when yoked, he must bear the principal part of the weight

Bible References

Two different species cannot associate comfortably together, nor pull pleasantly either in cart or plough; and the ass being lower than the ox, when yoked, he must bear the principal part of the weight

2 Corinthians 6:14
Do not be bound together with unbelievers; for what partnership have righteousness and lawlessness, or what fellowship has light with darkness?