(6) باب جَوَازِ جَعْلِ الإِذْنِ رَفْعَ حِجَابٍ أَوْ نَحْوَهُ مِنَ الْعَلاَمَاتِ
Ibn Mas'ud reported:
The Messenger of Allah (ﷺ) said to me: The sign that you have been permitted to come in is that the curtain is raised or that you hear me speaking quietly until I forbid you. (RU)
Reference (RU): Sahih Muslim 2169 a (RU)
In-book reference (RU): Book 39, Hadith 21 (RU)
USC-MSA web (English) reference(deprecated numbering scheme): Book 26, Hadith 5393 (RU)