Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) states that he heard the Prophet (peace and blessings be upon him) say: "Whoever presents himself before Allah Almighty on the Day of Resurrection with the five prayers, the fasts of Ramadan and the ritual bath (ghusl) for major impurity will be counted a true servant of Allah Almighty; and whoever commits betrayal in any of these will be counted a true enemy of Allah Almighty."
Imam al-Tabarani recorded it in al-Mu'jam al-Kabir, and its chain contains a narrator, al-Hajjaj bin Rishdin bin Sa'd, whom Ibn Adi declared da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الإيمان / 127