´It was narrated that Ibn 'Abbas said:` "The Salah was enjoined on the lips of the Prophet (ﷺ), four Rak'ahs while resident, and two while traveling, and one Rak'ah during times of fear."
Hadith ReferenceSunan an-Nasa'i / The Book of Salah / Hadith: 457
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم