After recitation:
• Say Takbir while moving into Ruku.
• Settle into the bowing posture with tranquility.
• A man holds the knees with fingers spread, keeps the shins upright, the back level and the head aligned with the back as the Sunnah form.
• Recite سُبْحَانَ رَبِّيَ الْعَظِيمِ three times as the minimum Sunnah perfection stated by the commentary.
The level back and finger posture are Sunnahs of form; they should not be described as separate Fard conditions.