The established hadith of Alqamah bin Wa'il from his father has already passed, that he saw the Prophet (peace and blessings be upon him); then he mentioned the complete hadith, and in it are these words: "So when he (peace and blessings be upon him) prostrated, he prostrated between his two palms."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / Q2691