“Whoever among you fears that he will not wake up at the end of the night, let him pray Witr at the beginning of the night, then go to sleep. Whoever hopes that he will wake up at the end of the night, let him pray Witr at the end of the night, for recitation (of the Qur’an) at the end of the night is attended (by the angels), and that is better.” (Using translation from Ibn Mājah 1187)
قَالَ رَسُولُ اللهِ ﷺ مَنْ خَشِيَ مِنْكُمْ أَنْ لَا يَقُومَ مِنْ آخِرِ اللَّيْلِ فَلْيُوتِرْ مِنْ أَوَّلِ اللَّيْلِ ثُمَّ ليَِرْقُدْ وَمَنْ طَمِعَ مِنْكُمْ فِي أَنْ يَقُومَ مِنْ آخِرِ اللَّيْلِ فَلْيُوتِرْ مِنْ آخِرِ اللَّيْلِ فَإِنَّ قِرَاءَةَ آخِرِ اللَّيْلِ مَحْضُورَةٌ وَذَلِكَ أَفْضَلُ