Reward of keeping the palms on the ground during Sajdah

1. Imam Ja’far Sadiq (a.s.) narrates from his predecessors that Amirul Momineen (a.s.) said, “When one of you performs the Sajdah you must place the palms of your hands on the ground, perhaps by that you will be exempted from the chains on the Day of Qiyamat.”