Musnad Ahmad 27:1257

'Abd al-Samad narrated to us, Hammad narrated to us, from Musa ibn 'Uqbah, from Salim, from Ibn 'Umar, that the Messenger of Allah (peace and blessings of Allah be upon him) said: "Usamah is the most beloved of people to me," not excluding Fatimah nor anyone else.