Saad used to instruct people to say five supplications, mentioning that the Prophet ﷺ used to instruct people to say them, "O Allah, I seek refuge in You from miserliness, I seek refuge in You from cowardice, I seek refuge in You from being returned to the most decrepit stage of old age, I seek refuge in You from the trial of this world," meaning the trial of the Dajjal, "and I seek refuge in You from the punishment of the grave."In another narration, the Prophet ﷺ used to teach us these words just as writing is taught.
كان سعد يأمر بخمس، ويذكرهن عن النبي ﷺ أنه كان يأمر بهن: اللهم إني أعوذ بك من البخل، وأعوذ بك من الجبن، وأعوذ بك أن أرد إلى أرذل العمر، وأعوذ بك من فتنة الدنيا- يعني فتنة الدجال- وأعوذ بك من عذاب القبر وفي رواية: كان النبي ﷺ يعلمنا هؤلاء الكلمات كما تعلم الكتابة.
Bukhari narrated it in the Book of Supplications (6365) from Adam, from Shubah, from Abdul-Malik (that is, Ibn Umayr), from Musab (that is, the son of Saad bin Abu Waqqas), and he mentioned it. The other narration, also from him (6390), is from Farwa bin Abu Mughra, from Ubayda bin Humayd, from Abdul-Malik bin Umayr, with the same content.