Verse of Quran

 وَبَشِّرْ الَّذِينَ آمَنُوا أَنَّ لَهُمْ قَدَمَ صِدْقٍ عِنْدَ رَبِّهِمْ

"...and convey glad tidings to the believers that they will have an exalted status with their Lord." (Surah Yunus 10:2)

Kulaini, through Ali Ibne Ibrahim, and Ayyashi, have reported that 'an exalted status' refers to the Holy Prophet (S) and the Holy Imams (a.s.), signifying their intercession and leadership. Kulaini also mentions in the same context that it pertains to the Wilayat (spiritual leadership) of Imam Ali (a.s.), which Ayyashi similarly confirms.