Anas bin Malik (may Allah be pleased with him) narrates: I and a small orphan boy prayed behind the Messenger of Allah (ﷺ), and Umm Sulaim (may Allah be pleased with her) was behind us.
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 288
Hadith Takhrijاخرجہ البخاری، الاذان، باب المرأة وحدہا تکون صفا: 727۔