Musnad Ahmad 1304:41

'Ali ibn 'Asim narrated to us, he said: 'Abdullah ibn 'Uthman ibn Khuthaym informed me, from Shahr ibn Hawshab, from Asma' bint Yazid al-Ansariyyah, she said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Shall I not inform you of the best among you?" They said: "Yes." He said: "The best among you are those who, when they are seen, Allah the Exalted is remembered." "Shall I not inform you of the worst among you?" They said: "Yes." He said: "The worst among you are those who spread corruption between loved ones, those who walk about with slander, and those who seek distress for the innocent."