Why does Shaykh Ibn Uthaymeen, as soon as he concludes the prayer, begin with a quiet dhikr and then raise his voice afterward?

The questioner : Shaykh, may Allah bless you. You stated that raising the voice in dhikr is a sunnah (recommended practice). Yes. It is observed, Shaykh, that when you first conclude the prayer, you proceed with a quiet dhikr. What is it? You proceed with some dhikr. Yes. What is it?

The Shaykh : Seeking forgiveness and saying, “O Allah, You are Peace, and from You comes peace. Blessed are You, O Possessor of Majesty and Honor.”

The questioner : And it falls within the scope of the sciences, Shaykh.

The Shaykh : It falls within the general ruling, though we might say it is not included, because of his statement, “when he turns away.” We know that “when they turn away” can be said to mean when the imam turns toward the ma'mum (those praying behind him). Otherwise, there is no doubt that if someone said that the dhikr extends to this point, the evidence is that the Companions narrated that he seeks forgiveness three times, saying, “I seek Allah’s forgiveness” three times, and then says, “O Allah, You are Peace, and from You comes peace.”