Narrated Ibn Abbas: The Prophet (ﷺ) sent Muadh to Yemen and said, “Be afraid, from the curse of the oppressed as there is no screen between his invocation and Allah.”
Sahih al-Bukhari 2448
¨Your Lord says, ‘Call on Me and I will answer you.¨
Sura del Ghafir, 40/60
Nu’man b. Bashir reported Allah’s Messenger (ﷺ) as saying: The similitude of believers in regard to mutual love, affection, fellow-feeling is that of one body; when any limb of it aches, the whole body aches, because of sleeplessness and fever.
Sahih Muslim 2586a