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. (Using translation from Abū Dāʾūd 426)   

سُئِلَ رَسُولُ اللهِ ﷺ أَيُّ الْأَعْمَالِ أَفْضَلُ؟ فَقَالَ الصَّلَاةُ فِي أَوْلِ وَقْتِهَا قَالَ الْخُزَاعِيُّ فِي حَدِيثِهِ عَنْ عَمَّةٍ لَهُ يُقَالُ لَهَا أُمُّ فَرْوَةَ وَقَدْ بَايَعَتِ النَّبِيَّ ﷺ أَنَّ النَّبِيَّ ﷺ سُئِلَ وَرُوِّينَا عَنِ ابْنِ عُمَرَ مَا قَدْ مَضَى