بُلُوغُ الْمَرَامِ
Bulugh al-Maram 326
The Book of Prayer
وَعَنْ أَبِي أُمَامَةَ - رضى الله عنه - قَالَ : قَالَ رَسُولُ اَللَّهِ - صلى الله عليه وسلم -{ مَنْ قَرَأَ آيَةَ اَلْكُرْسِيِّ دُبُرَ كُلِّ صَلَاةٍ مَكْتُوبَةٍ لَمْ يَمْنَعْهُ مِنْ دُخُولِ اَلْجَنَّةِ إِلَّا اَلْمَوْتُ } رَوَاهُ النَّسَائِيُّ , وَصَحَّحَهُ اِبْنُ حِبَّانَ . [1]
Narrated Abu Umamah (RA): Allah's Messenger (ﷺ) said: "Whoever recites Ayat al-Kursi at the end of every obligatory prayer, nothing but death will prevent him from entering Paradise." [An-Nasa'i reported it, and Ibn Hibban graded it Sahih (authentic).
Sunnah.com reference: Book 2, Hadith 220