1 Corinthians 7:6
but as for the rest, I speak it by way of counsel, and not of command.
2 Corinthians 8:8
I don't mean to prescribe to you, but that the zeal of others may show you are as sincerely well-affected.
1 Corinthians 7:12
But as to the other cases, which were not decided by the Lord; I say, if any brother has a pagan wife, who likes to live with him, let him not put her away.
1 Corinthians 7:25
As to the case of celibacy, I have no positive instructions: yet my advice deserves to be regarded, as coming from one the divine favour has distinguished.
2 Corinthians 11:17
what I say, I say it not as an apostle, but as it were to indulge my vanity in this matter of boasting.