Does anyone use a word/phrase to let their partner know a scene is coming to an end?

I saw someone recommend that to help prevent really sudden ends to scenes and I'm interested in trying it and id appreciate any suggestions/advice from you guys as I'm a little bit lost on words or phrases that could work. It would preferably something that could be said without interrupting the scene or being too jarring - like something that could naturally be said and fit in the context of a scene. If it helps, I'm a sub and we're currently doing more impact play and we're big into verbal degredation/humiliation. Thank you for any suggestions.

Edit: I should clarify. Aftercare, we're fine. Safe words, we're fine. However I always find the transition to the end of a scene quite jarring. It feels sudden and then I'm suddenly meant to want to start aftercare and cuddles and whatever we were doing before just stops. I'm looking for a way to ease into the end of a scene. For example, slowing things down and stopping the more intense stuff earlier on. I'm kinda looking for the verbal equivalent of that. Something my Dom can say 5ish minutes before we stop so I can mentally prepare myself for the end. And then start aftercare.