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.