Where is the verse about people sinning because they know God will forgive them? I've been trying to find a verse I read not too long ago for quite some time about sinning and knowing it's wrong, but sinning anyway because you know God will forgive you. I believe it also mentioned how people who do this are even lower than people who sin, then repent and attempt to stop doing it.

I know that verse-identification has had a lot of discussion on the meta as to whether it should be allowed, and it seems most people would only allow it under very strict circumstances. That said, I do agree with this opinion, but I also believe that this question meets those circumstances, so I will take the risk.

I have been trying to find this verse for quite some time, and I can't find it. I've searched Google, I've looked it up on quite a few websites, I've even asked other people if they had seen the verse. It's almost like it didn't exist, but I'm 100% certain that I saw it, but I can't find it.   Point is, I've searched all over the place to no avail, and I feel that this is the last place I can possibly turn.

If anyone has seen this verse I would very much appreciate it, but if you haven't seen this particular verse, I would rather you not answer with a verse that has a similar subject, but is different. Thanks.



Update:
I just asked a particular person who I hadn't asked before and they said they knew the verse I was talking about, but wasn't sure where it was. They hunted around for a while looking for it and found a few similar verses, but not the correct one. To make things easier, I will name a few verses it isn't, but it would be nigh impossible to track down every similar verse I've seen that isn't the one. I'll also include passages that have been put in answers that aren't it.

Many of the verses I have seen that aren't it are as follows:


Romans 6:15 
Luke 13:3 
1 John 5:18 
Hebrews 10:26-31 
2 Peter 2:20-21


There are other verses I have seen, but these verses were the closest ones I found.
This is a major point of Romans 6.  After arguing that the coming of the law increased the number of trespasses, and that subsequently &quot;grace abounded all the more,&quot; Paul warns those who might twist his words:

6:1 What shall we say then? Are we to continue in sin that grace may abound? 2 By no means! How can we who died to sin still live in it?
6:15 What then? Are we to sin because we are not under law but under grace? By no means! 16 Do you not know that if you present yourselves to anyone as obedient slaves, you are slaves of the one whom you obey, either of sin, which leads to death, or of obedience, which leads to righteousness? (ESV)