Do the dhikr after the prayers include the voluntary prayers?

Question:
(Whoever) prays two rak'ahs of a voluntary prayer, does he remember his Lord by saying: "I seek Allah's forgiveness, I seek Allah's forgiveness" three times, then saying: "O Allah, You are Peace and from You comes peace. Blessed are You, O Owner of Majesty and Honor... to the end of it...?

Answer:
This is a recommended practice (sunnah).
Q: Even in the night prayer, for example, when one stands up...?
The Shaykh: Any prayer.
Q: Or in the midday prayer or at any time?
The Shaykh: Yes; the Prophet (peace and blessings be upon him) used to say when he finished his prayer: "I seek Allah's forgiveness, I seek Allah's forgiveness, I seek Allah's forgiveness. O Allah, You are Peace and from You comes peace. Blessed are You, O Owner of Majesty and Honor." The principle is that the voluntary prayer is like the obligatory prayer in this, unless there is evidence .