Musnad Ahmad 30:1677

Khalaf ibn al-Walid narrated to us, he said: Khalid ibn Abdullah al-Muzani narrated to us, from Suhayl ibn Abi Salih, from his father, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "The best of the rows of men is the first of them, and the worst of them is the last of them. And the best of the rows of women is the last of them, and the worst of them is the first of them."