question #1 Sahih al-Bukhari 559, Book 9, Hadith 36 : What does this narration indicate about the timing of the Maghrib prayer during the Prophet’s time?

We used to offer the Maghrib prayer with the Prophet (ﷺ) and after finishing the prayer one of us may go
away and could still see as Par as the spots where one’s arrow might reach when shot by a bow.