Silsilat al-Ahadith al-Sahihah

Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) says that I heard the Messenger of Allah (peace and blessings be upon him) say: “«لَا إِلَـٰهَ إِلَّا اللَّـهُ» is the most virtuous remembrance, and «اَلْحَمْدُ لِلّٰهِ» is the best word of gratitude.”