once
إِنَّ أَفْضَلَ الدُّعَاءِ الْحَمْدُ لِلَّهِ، وَأَفْضَلَ الذِّكْرِ لاَ إِلَهَ إِلاَّ اللَّهُ
Edition transliteration
Jabir Ibn ‘AAabdullah related that the Messenger of Allah said: ‘Verily, the best supplication is: (Alhamdu lillah) and indeed, the best form of remembrance is: (La ilaha illal-lah.)
Meaning
Jabir Ibn ‘AAabdullah related that the Messenger of Allah said: ‘Verily, the best supplication is: (All praise is for Allah.) and indeed, the best form of remembrance is: (None has the right to be worshipped except Allah.)
Source and references
Hisn al-Muslim, entry 264.The reference is copied from the edition; separate editorial verification is not complete yet.
Source edition: Fortress of the Muslim. Open source ↗