Discussion on the difference in intention in prayer

The Shaykh: It is a four-rak'ah prayer, and the time is the time of 'Isha'. From this side, they meet, but from the side of intention, there is a difference. How do they say there is no difference? You go back and say, "He says there is a difference, and we say there is no difference, and we prove it to him with the previous example: he intended to pray the obligatory prayer, but he made a mistake and intended to pray a voluntary prayer at the time of Zuhr, at the time of 'Asr, or at any time. Is his prayer valid? He will say, 'No.' Why? Because the intention changed. Yes, what is summer and winter on the same roof? Once the intention changed, and once it did not change. Then I will tell you something.
The student: Yes.

The Shaykh: Certainly, this one you are quoting from, may Allah know best, is from the youth.
The student: By Allah, O our Shaykh, it is Shaykh Ahmad.

The Shaykh: Shaykh Ahmad himself. May Allah guide us and him.
The student: Why? What is he saying, O our Shaykh?

The Shaykh: Yes.
The student: He says that the prayer of the boy, the boy prays, for example, 'Isha as an obligation. He prayed the 'Isha obligation, but in the case of the boy, it is said to be voluntary. He said, and Mu'awiyah and Mu'adh prayed the 'Isha obligation, but in their case, it is voluntary.

The Shaykh: May Allah guide you and him. Have you brought something new now?
The student: No, of course, it is the same thing.

The Shaykh: It is a problem.