Buraidah (May Allah be pleased with him) reported:
Messenger of Allah (ﷺ) said, "That which differentiates us from the disbelievers and hypocrites is our performance of Salat. He who abandons it, becomes a disbeliever."[At-Tirmidhi]. (DE)
App reference (DE): Book 9, Hadith 89 (DE)
Arabic/English book reference (DE): Book 9, Hadith 1079 (DE)