Allah's Messenger said: "Be balanced in the prostration, and let one of you not spread his forearms (on the ground) in the Salat like the spreading of the dog."
Jami` at-Tirmidhi Book 2, Hadith 128
← Previous Hadith the Prophet said: "When one of you prostrates, then let him be balanced, and let him not lay his forearms down like the lying of the dog."

Jami` at-Tirmidhi Book 2, Hadith 127 Next Hadith → "The Prophet ordered placing the hands (on the ground) keeping the feet erect. (by resting feet on the toes and making the tips of the toes facing the Qiblah)."

Jami` at-Tirmidhi Book 2, Hadith 129