Which phrase is not a pure remembrance suitable for beginning prayer under the rule discussed in the commentary?

Prayer Conditions: Time, Intention, and the Opening Tahrimah

• اللَّهُ أَكْبَرُ
• سُبْحَانَ اللَّهِ
• اللَّهُمَّ اغْفِرْ لِي
• لَا إِلَهَ إِلَّا اللَّهُ