Kulaib bin Muawiya Al-Saldawl, from JAAFAR BIN MOHAMMAD (ASWS), who said:
What stops you (Shia) from telling people that you believe in that which ALLAH (SWT) has ordered you to believe? Tell people that ALLAH (SWT) has chosen MOHAMMAD (SAWW) and we have chosen to follow the family of MOHAMMAD (SAWW). Therefore, we are following the chosen creation of ALLAH (SWT).
(Amaali of Tousi 1:231.)