Musannaf Ibn Abi Shayba 23:5

Waki’ narrated to us, from Sufyan, from Abu Ishaq, from Silah, who said: Hudhayfah said: Islam is eight shares: Prayer is a share, Zakat is a share, Jihad is a share, fasting Ramadan is a share, enjoining good is a share, forbidding evil is a share, and Islam is a share. And he who has no share has failed.