It is narrated from Sayyiduna Malik bin al-Huwayrith (may Allah be pleased with him): I saw the Messenger of Allah (peace and blessings be upon him) raising both hands in his prayer; when he bowed or rose from the bowing, he would bring both hands up to the lobes of his ears.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2513