Niyyah

النية

The sincere intention in the heart that precedes any act of worship; the Prophet ﷺ said "actions are by intentions."

Referensi

Al-Quran:
98:5
Hadis:
Bukhari 1, Muslim 1907 (Actions are by intentions); Bukhari 6491 (Reward for intending good); Muslim 2564 (Allah looks at hearts and deeds); Tabarani (Intention better than action); Ahmad 23630 (Minor shirk is showing off); Quran 98:5 (Worship Allah sincerely)