Musannaf Ibn Abi Shayba 9:1655

Abu Bakr narrated to us, he said: Muhammad ibn Fudayl narrated to us, from ‘Asim, from Abu ‘Uthman, from Salman, who said: I do not care, when I am alone with my wife, and I have closed my door, and I have let down my curtain, whether I speak of it to the people or whether I do that while the people are looking.