English Standard Version
I say this not as a command, but to prove by the earnestness of others that your love also is genuine.

American Standard Version
I speak not by way of commandment, but as proving through the earnestness of others the sincerity also of your love.

Berean Study Bible
I am not making a demand, but I am testing the sincerity of your love in comparison to the earnestness of others.

Douay-Rheims Bible
I speak not as commanding; but by the carefulness of others, approving also the good disposition of your charity.

English Revised Version
I speak not by way of commandment, but as proving through the earnestness of others the sincerity also of your love.

King James Bible
I speak not by commandment, but by occasion of the forwardness of others, and to prove the sincerity of your love.

World English Bible
I speak not by way of commandment, but as proving through the earnestness of others the sincerity also of your love.

Young's Literal Translation
not according to command do I speak, but because of the diligence of others, and of your love proving the genuineness,

2 Corinthians 8:8 Additional Translations ...