"The Janazah of a boy and a woman were brought. The boy was placed closer to the people and the woman was placed beyond him, and the funeral prayer was offered for them. Among the people were Abu Saeed Al-Khudri, Ibn Abbas, Abu Qatadah and Abu Hurairah. I asked them about that and they said: '(It is) Sunnah."'

Sunan an-Nasa'i Book 21, Hadith 160