Prophet of Islam (PBUH): Whoever I am his master and possessor, Ali is also his master and possessor. O, Allah! Whoever accepts Ali's guardianship, be his guardian, and whoever is hostile to him, be his enemy.
Kanzul Ummal Vol 11, page 609.
Imam Hussein (as) said to Almighty God:O God! Give me the success to be grateful for all the outward and inward blessings my parents have been granted so that I will not be indebted to you in thanking in the Hereafter.