Hadithcore
Mishkat al-Masabih, 923

Ibn Mas'ud reported God’s Messenger as saying, “The one who will be nearest me on the day of resurrection will be the one who invoked most blessings on me.” Tirmidhi transmitted it.

وَعَنِ ابْنِ مَسْعُودٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسلم: «أَوْلَى النَّاسِ بِي يَوْمَ الْقِيَامَةِ أَكْثَرُهُمْ عَلَيَّ صَلَاة» . رَوَاهُ التِّرْمِذِيّ

References1 variant
In-Book Reference
Book 4, Hadith 346