The Prophet ﷺ asked AbuBakr: When do you observe the witr? He replied: I observe the witr prayer in the early hours of the night. The Prophet ﷺ asked Umar: When do you observe the witr? He replied: At the end of the night. He then said to AbuBakr: This has followed it with care; and he said to Umar: He has followed it with strength.
أَنَّ النَّبِيَّ ﷺ قَالَ لأَبِي بَكْرٍ مَتَى تُوتِرُ قَالَ أُوتِرُ مِنْ أَوَّلِ اللَّيْلِ وَقَالَ لِعُمَرَ مَتَى تُوتِرُ قَالَ آخِرَ اللَّيْلِ فَقَالَ لأَبِي بَكْرٍ أَخَذَ هَذَا بِالْحَزْمِ وَقَالَ لِعُمَرَ أَخَذَ هَذَا بِالْقُوَّةِ