First, if you were the one who made the choice to end the marriage and now you are wondering, how do I stop the divorce? You have to realise that, in comparison to most, you are in good shape when it comes to saving your marriage. Explain that you acted impulsively and that now you regret it. Tell them you were wrong about what you said and that you would like to know how to stop the divorce proceedings.
It is necessary to take this step, no matter how difficult it is. As it was your idea in the first place to bring up divorce then your partner may have had time to take it into serious consideration. They may even think that it is a good idea. But you only want to know how to stop the divorce so as well as making sure they know you think you were wrong to bring it up, you must also know what they are thinking about the idea. It is possible that your partner hasn't had enough time to think the subject through clearly enough and therefore hasn't decided that divorce is necessary. If this is the case then you may be able to stop the divorce just by admitting you were wrong.
But you may have your work cut out for yourself if you are now wondering how to stop the divorce when you didn't want it in the first place. Without resorting to accusations or judgements against your partner, you need to explain that you feel the marriage is worth saving and that you would do anything to stop the divorce. Chances are that you've done this, more than once. You have to remember that the way you say it makes all the difference.