The Messenger of Allah (ﷺ) said: "Do not rest your forearms on the ground like a dog when prostrating."
Sunan an-Nasa'i Book 12, Hadith 75
← Previous Hadith "I came to Al-Madinah and said: 'I am going to watch the Messenger of Allah (ﷺ) pray. He said the takbir and raised his hands until I saw his thumbs near his ears. When he wanted to bow, he said the takbir and raised his hands. Then he raised his head and said: 'Sami Allahu liman hamidah (Allah hears the one who praises Him).' Then he said the takbir and prostrated, and his hands were in the same position in relation to his ears as when he started the prayer."

Sunan an-Nasa'i Book 12, Hadith 74 Next Hadith → "Al-Bara' described the prostration to us. He places his hands on the ground and raised his posterior and said: 'This is what I saw the Messenger of Allah (ﷺ) doing."

Sunan an-Nasa'i Book 12, Hadith 76