Imam -asws opened his palms with his fingers closed side by side...

[6] Performing of the ‘Sajdah’ (Hadith on Salat continues) The Imam -asws did not place any other part of his body on any other part thereof. He -asws performed sajdah on eight parts of his -asws limbs: his palms, (2) knees, (2) big toes of his feet, (2) his forehead and (1) his nose. (1) The Imam -asws said: ‘Placing seven parts of these limbs on the ground is obligatory during sajdah but one of them (the nose) is not obligatory.

This is what Allah -azwj has spoken of in the Quran, “The parts of the body to be placed on the ground during sajdah belong to Allah, you then must not worship anyone other than Allah” (72: 17) . Such parts are forehead, palms, knees and big toes of feet.

Placing one’s nose on the ground is optional.’ Additional reference: on the place of Sajdah ‘Abu ‘Abd Allah -asws has said, ‘You must not perform Sajdah on anything except for earth or on what grows from earth except for cotton and linen.’ [7] Additional reference: on Placing the Forehead on the Ground Imam Abu Jafar -asws said: ‘The entire forehead, from the hairline to the eyebrows is for Sajdah, even if the part of this area that goes on the ground is the size of a dirham or is the size of a finger’s tip, then that area is sufficient.’ [8] Sitting Posture between two ‘Sajuds’ (Hadith on Salat continues) Imam -asws then raised his head from sajdah.

Imam -asws did not place any other part of his body on any other part during Ruku’ or sajdah.