2 Corinthians 2:8

Therefore I urge you to reinstate him in your affections and reaffirm your love for him.

Galatians 5:13

For you, my brothers, were called to freedom; only do not let your freedom become an opportunity for the sinful nature (worldliness, selfishness), but through love serve and seek the best for one another.

Galatians 6:1-2

Brothers, if anyone is caught in any sin, you who are spiritual [that is, you who are responsive to the guidance of the Spirit] are to restore such a person in a spirit of gentleness [not with a sense of superiority or self-righteousness], keeping a watchful eye on yourself, so that you are not tempted as well.

Galatians 6:10

So then, while we [as individual believers] have the opportunity, let us do good to all people [not only being helpful, but also doing that which promotes their spiritual well-being], and especially [be a blessing] to those of the household of faith (born-again believers).

Jude 1:22-23

And have mercy on some, who are doubting;

Treasury of Scripture Knowledge

Summary

Wherefore I beseech you that ye would confirm your love toward him.

General references

Bible References

That

Galatians 5:13
For you, my brothers, were called to freedom; only do not let your freedom become an opportunity for the sinful nature (worldliness, selfishness), but through love serve and seek the best for one another.
Galatians 6:1
Brothers, if anyone is caught in any sin, you who are spiritual [that is, you who are responsive to the guidance of the Spirit] are to restore such a person in a spirit of gentleness [not with a sense of superiority or self-righteousness], keeping a watchful eye on yourself, so that you are not tempted as well.
Jude 1:22
And have mercy on some, who are doubting;

General references

John 20:23
If you forgive the sins of anyone they are forgiven [because of their faith]; if you retain the sins of anyone, they are retained [and remain unforgiven because of their unbelief].”