Salafī
A salafī is someone who firmly believes in Allāh and his messenger and follows the Quran and Sunnah with the understanding of the salaf
"al-salaf al-ṣāliḥ"
(The Pious Predecessors)
The first: the prophet Muḥammad ﷺ and his companions (Ṣaḥābah)
The second: the Tābʿīn (the followers of the companions).
The third: the Tābiʿū al-Tābʿīn (the followers of the followers of the companions).
The Prophet, peace and blessings be upon him, said: "The best people are those of my generation, then those who come after them, then those who come after them."
Daleel: Ṣaḥīḥ al-Bukhārī (6429) & Ṣaḥīḥ Muslim (2533)
The Prophet, peace and blessings be upon him, said: "so fear Allah and be patient for indeed I am a blessed "salaf" for you"
Daleel: Ṣaḥīḥ al-Bukhārī (5928) and Ṣaḥīḥ Muslim (2450)