Delaying divorce until someone finishes his studies

Q 1: I am married to two women and have children from both of them. They do not stay at the same house because one of them causes many problems, troubles and disputes with me. One day, she enraged me and I said to her, "I will be patient and keep you with me until so-and-so (her youngest son) finishes his studies". I said this with the intention of divorcing her and I used it to threaten her with that. Now, I regret it, but I am sure I did not swear to divorce her. I only had the intention to do so. Please give me your Fatwa (legal opinion issued by a qualified Muslim scholar) and may Allah reward you.

A: There is no harm on you so long as you did not utter the word of divorce. The Prophet (peace be upon him) said, “Truly Allah overlooks what my people say to themselves, as long as they do not act upon it or say it (out loud).” (Related by Muslim in his Sahih book of authentic Hadith) May Allah grant us success. May peace and blessings be upon our Prophet, his family, and Companions.