أَفْضَلُ الصَّدَقَةِ مَا كَانَ عَنْ ظَهْرِ غِنًى
The best charity is that given out of sufficiency, and begin with those you are responsible for.
Hadith
A curated selection from the six books, with narrator and reference for each.
2 hadiths
أَفْضَلُ الذِّكْرِ لاَ إِلَهَ إِلاَّ اللَّهُ
The best remembrance is 'La ilaha illallah', and the best supplication is 'Alhamdulillah'.
Wording follows widely used English renderings. For study, check each hadith against a published edition of its collection.