Does a vow take effect if a person utters it unintentionally or without explicit intent, due to their mind being preoccupied and focused on the matter, and does the ruling on a frivolous vow apply to it?

If the words of a vow are uttered by a person suffering from obsessive thoughts (waswasa) in a state of absentmindedness and heedlessness, without true intention, then the vow is not valid. This is because intention is a condition for the validity of a vow, unlike the jester or playful person whose vow and oath are valid. The point is that speech uttered absentmindedly without understanding its meaning, or by a sleeper, or as a slip of the tongue, does not entail a ruling. Islamic law takes into account psychological impediments such as heedlessness and absentmindedness and their effect on speech. As for the Hanafis, they believe that intention is not a condition for oaths and divorce; in this regard, the intentional, the forgetful, and the absentminded are all the same.