The Messenger of Allah (ﷺ) was asked: Which of the actions is best? He replied: Observing prayer early in its period.

Al-Khuza'i narrated in his version from his aunt named Umm Farwah who took the oath of allegiance to the Prophet (ﷺ): He was questioned.
Sunan Abi Dawud Book 2, Hadith 36
← Previous Hadith AbuMuhammad fancies that witr prayer is essential. (Hearing this) Ubadah ibn as-Samit said: AbuMuhammad was wrong. I bear witness that I heard the Messenger of Allah (ﷺ) say: Allah, the Exalted, has made five prayers obligatory. If anyone performs ablution for them well, offers them at their (right) time, and observes perfectly their bowing and submissiveness in them, it is the guarantee of Allah that He will pardon him; if anyone does not do so, there is no guarantee for him on the part of Allah; He may pardon him if He wills, and punish him if He wills.

Sunan Abi Dawud Book 2, Hadith 35 Next Hadith → A man from Basrah said: Tell me what you heard from the Messenger of Allah (ﷺ). He said: I heard the Messenger of Allah (ﷺ) say: No one will enter Hell who has prayed before the rising of the sun and before its setting (meaning the dawn and the afternoon prayers). He said three times: Have you heard it from him? He replied: Yes, each time saying: My ears heard it and my heart memorised it. The man then said: And I heard him (the Prophet) say that.

Sunan Abi Dawud Book 2, Hadith 37