If a person combines Maghrib and 'Isha' by praying them early, is it permissible for him to pray Witr immediately?

The questioner : Peace be upon you, and Allah's mercy and blessings.

The Shaykh : And upon you be peace, and the mercy of Allah and His blessings.

The questioner: How are you, my Shaykh?

The Shaykh : Praise be to Allah, I am well

The questioner : How is the validity?

The Shaykh : May Allah preserve you

The questioner : May Allah welcome you

The Shaykh : Welcome.

The questioner : My master, regarding the combining of prayers

The Shaykh : The combining of the two prayers

The questioner : ... 'Isha' and Maghrib

The Shaykh : Ah

The questioner : Regarding the Witr prayer, is it restricted to a specific time, or is it after the prayer?

The Shaykh : Is the 'Isha' prayer restricted to a specific time, or not?

The questioner : Witr

The Shaykh : I am just asking you, is the 'Isha' prayer restricted to a specific time, or not?

The questioner : Yes.

The Shaykh : So, did the one who combined it with Maghrib pray it within its time, or not?

The questioner : ..

The Shaykh : So, if he prays it with Witr, does that mean he prayed Witr within its time, or not?

The questioner : Yes, correct.

The Shaykh : Yes, I have received the answer, if Allah wills.

The questioner : May Allah keep you.

The Shaykh : May Allah keep you alive.

The questioner : Thank you.

The Shaykh : Welcome.

The questioner : May Allah reward you, my master.

The Shaykh : Peace be upon you

The questioner : May Allah keep you.