Is it permissible for a Muslim to pray the obligatory prayer twice in order to increase the reward?

The questioner : Does it benefit a person to pray twice?

The Shaykh : To pray twice.

The questioner : To pray first, and then pray again.

The Shaykh : What does he pray, for example? What does he pray?

The questioner : The same prayer.

The Shaykh : What does he pray, for example?

The questioner : He goes down to the 'Isha' prayer, prays it, then returns to pray it again.

The Shaykh: Why?

The questioner : Does it benefit?

The Shaykh : Why does he pray it a second time?

The questioner : ... .
The student : Why does he pray it a second time? For what purpose does he pray it a second time?

The Shaykh : All right, also, if your mother told you this, why do you need to ask? Your mother is obligated to learn the matters of her religion, either from her husband, from her reading, or otherwise. So, at the very least, she is more knowledgeable than you, isn't she? If she told you it is permissible, why do you need to ask? You must take your mother's words and treat them with what? Trust and knowledge. But you didn't understand her, so go ask her. You will say that it is permissible for one to repeat the prayer a second time. The Shaykh asks why the repetition. You didn't understand why. Understand why. So, go ask her and come back.
The student : She doesn't pray with us. I know...

The Shaykh : May Allah guide you. I want to keep him busy.