Yahya related to me from Malik from Yahya ibn Sa'id from Sulaymanibn Yasar that the Messenger of Allah, may Allah bless him and granthim peace, used to raise his hands in the prayer.
App reference: Book 3, Hadith 19
USC-MSA web (English) reference: Book 3, Hadith 19
Arabic reference: Book 3, Hadith 165