What is the ruling on licking the fingers after eating?

The Shaykh: Yes.

The questioner : What is the ruling on licking the fingers after eating?

The Shaykh : Licking them is obligatory.
The student : Our Shaykh, the Muslims of Iraq send you their greetings.

The Shaykh : Peace be upon you and upon them. How are they doing?
The student : Praise be to Allah, I am well.

The Shaykh : Send them your greetings.
The student: Peace be upon you.

The Shaykh: And upon you peace.
The student : If you please.

The Shaykh: Yes.
The student: Peace be upon you.

The Shaykh : Welcome, and peace be upon you. May Allah bless you.
The student : How is your health?

The Shaykh : I praise Allah in all circumstances.
The student : Praise be to Allah for your safety.

The Shaykh : How are you?
The student : May Allah keep you safe and honor you.

The Shaykh : Welcome.