أَفْضَلُ الذِّكْرِ لاَ إِلَهَ إِلاَّ اللَّهُ، وَأَفْضَلُ الدُّعَاءِ الْحَمْدُ لِلَّهِ
English
The best remembrance is 'there is no god but Allah', and the best supplication is 'all praise is due to Allah'.
Narrated by Jabir ibn Abdullah
أَفْضَلُ الذِّكْرِ لاَ إِلَهَ إِلاَّ اللَّهُ، وَأَفْضَلُ الدُّعَاءِ الْحَمْدُ لِلَّهِ
English
The best remembrance is 'there is no god but Allah', and the best supplication is 'all praise is due to Allah'.
Read together with the chapters on adhkar in Al-Adhkar of al-Nawawi, which the Shafi'i school treats as authoritative.