Imam Muhammad al-Baqir (p) said,

“…Does the one who claims to be of the Shia think it is enough to (simply) speak of loving us, Ahl al-Bayt (the Prophet’s family)? By God, our Shia are only those who are mindful of God and obey Him. They were known…only (in light of their) modesty, humility, trustworthiness, abundant remembrance of God, fasting, prayer, honoring parents, caring for neighbors, the poor, people in need, those in debt, and orphans… (they were known for their) truthful words, the recitation of Qur’an, and holding their tongues back unless it was to speak good of people. They were the trustees (entrusted) by their peoples in (the various) affairs…”

Pg. 74, Vol. 2 of al-Kafi by Sh. al-Kulayni