Musannaf Ibn Abi Shayba 33:445

Mu'adh ibn Mu'adh al-Taymi narrated to us, from Abu 'Uthman, from Salman, who said: If two men were to spend the night, one of them giving to the white singing girls, and the other spending the night reciting the Qur'an and remembering Allah, I would consider the one remembering Allah to be better.