MANY THINGS [THAT fall within the scope of] this chapter have already been mentioned in the relevant chapters. The best of these are the following.
We relate from the book of at-Tirmidhī that Usāmah ibn Zayd 
reported that the Messenger of Allah 
said: “Whoever is treated well and says ‘May Allah reward you with goodness’ has exerted himself fully in praise and gratitude.” [1].At-Tirmidhī described this hadith as ḥasan ṣaḥīḥ.
reported that the Messenger of Allah said: “Whoever is treated well and says ‘May Allah reward you with goodness’ has exerted himself fully in praise and gratitude.” [1].At-Tirmidhī described this hadith as ḥasan ṣaḥīḥ.
Jazāka-llāhu khayrā.
Not long ago, in the chapter on safeguarding the tongue, we quoted from a ṣaḥīḥ hadith his words : “. . . and if a person does something good to you, repay and reward him. If you do not possess anything with which to reward him, make du‘ā’ for him until you think that you have recompensed him.” [2].
: “. . . and if a person does something good to you, repay and reward him. If you do not possess anything with which to reward him, make du‘ā’ for him until you think that you have recompensed him.” [2].References
[1] At-Tirmidhī (2036).
[2] Abū Dāwūd and an-Nasā’ī.