Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
bayhaqi:4754Abū ʿAbdullāh > ʿAbd al-Raḥman b. al-Ḥasan al-Qāḍī > Ibrāhīm b. al-Ḥusayn > Ādam b. Abū Iyās > al-Mubārak b. Faḍālah > al-Ḥasan

[Machine] Every prayer after the last evening prayer is from the night Prayer.  

البيهقي:٤٧٥٤وَأَخْبَرَنَا أَبُو عَبْدِ اللهِ أنبأ عَبْدُ الرَّحْمَنِ بْنُ الْحَسَنِ الْقَاضِي ثنا إِبْرَاهِيمُ بْنُ الْحُسَيْنِ ثنا آدَمُ بْنُ أَبِي إِيَاسٍ ثنا الْمُبَارَكُ بْنُ فَضَالَةَ عَنِ الْحَسَنِ قَالَ

كُلُّ صَلَاةٍ بَعْدَ الْعِشَاءِ الْآخِرَةِ فَهِيَ مِنْ نَاشِئَةِ اللَّيْلِ