Sa'eedbin Musayyab said that Abu Qatadah bin Rib'i told him that theMessenger of Allah (ﷺ) said:
"Allah said: 'I have enjoined onyournation five prayers, and I have made a covenant with Myself thatwhoever maintains them, I will admit them to Paradise, and whoeverdoes not maintain them, has no such covenant with Me.'" (FR)
English reference (FR): Vol. 1, Book 5, Hadith 1403 (FR)
Arabic reference (FR): Book 5, Hadith 1467 (FR)