Hadith.929 - Ismail ibn Muslim narrated from Imam Al-Sadiq, from his father عليه السلام, who said:
"When any of you performs Sujood (prostration), let them place their palms directly on the ground, so that Allah سبحانه وتعالى may protect them from shackles on the Day of Judgment."
When you go into Sujood, lower yourself as a lean camel does when resting, and be as if suspended, ensuring no part of your body rests upon another. Your gaze in Sujood should be directed towards the tip of your nose. Do not spread your forearms like a wild beast; rather, position them away from your sides. Pressing your nose to the ground is obligatory, and the area of contact for the forehead should be at least the size of a coin between the hairline and the eyebrows. Whoever does not press their nose down has no prayer.
While in Sujood, recite: "O’ Allah سبحانه وتعالى, for You I have prostrated, in You I have believed, to You I have submitted, upon You I have relied. My face, hearing, sight, hair, skin, brain, nerves, and bones have prostrated to You. My face prostrates to the One Who created it, shaped it, and gave it hearing and sight. Blessed is Allah سبحانه وتعالى, the Lord عز وجل of the worlds."
Then say: "Glory be to my Lord عز وجل, the Most High, and all praise is due to Him" three times. If you recite it five times, it is better, and if seven times, it is even more virtuous. Three repetitions of "Subhan Allah سبحانه وتعالى, Subhan Allah سبحانه وتعالى, Subhan Allah سبحانه وتعالى" suffice, especially for the ill or those in a hurry.
After raising your head from Sujood, pull your hands towards yourself and sit while saying takbir (Allahu Akbar). While sitting between the two Sujood, say: "O’ Allah سبحانه وتعالى, forgive me, have mercy on me, protect me, guide me, grant me well-being, and pardon me." A simple "O’ Allah سبحانه وتعالى, forgive me and have mercy on me" will suffice.
Then go into Sujood again, repeating what you said in the first.
Sitting in an upright position (iq’aa) is permissible between the two Sujood and between standing and sitting postures of the prayer, but it is not allowed in the places for tashahhud (testimonies), because a person in iq’aa is not truly seated but rather has part of their body resting upon itself, making it difficult for extended recitations and tashahhud.
If the Imam makes someone sit when they should stand, they should lean.
Sujood is the peak of human devotion to Allah سبحانه وتعالى, and a servant is closest to Allah سبحانه وتعالى during prostration, as indicated in His words: "Prostrate and draw near."