Surat Ar Rahman strengthens the heart. its such a beautiful surah so do read it. just listening to it has a soothing effect,
say this
“Alaahumma ‘innee ‘abduka, ibnu ‘abdika, ibnu ‘amatika, naasiyatee biyadika, maadhin fiyya hukmuka, ‘adlun fiyya qadhaa’uka, ‘as’aluka bikulli ismin huwa laka, sammayta bihi nafsaka, ‘aw ‘anzaltahu fee kitabika, ‘aw ‘allamtahu ‘ahadan min khalqika, ‘awista’tharta bihi fee ‘ilmil-ghaybi ‘indaka, ‘an taj’alal-Qur’aana rabee’a qalbee, wa noora sadree, wa jalaa’a huznee, wa thahaaba hammee.”
“laa ‘ilaaha ‘illallaahul-’Adheemul-Haleem, laa ‘ilaaha ‘illallaahu Rabbul-’Arshil-’Adheem, laa ‘ilaaha ‘illallaahu Rabbus-samaawaati wa Rabbul-’ardhi wa Rabbul ‘Arshil-Kareem”
“laa ‘ilaaha ‘illaa ‘Anta subhaanaka ‘innee kuntu minadh-dhaalimeen”