How to Remove the Rust from the Heart:(By Sheikh-ul-Islam Hazrat Maulana Mufti Muhammad Taqi Usmani)
The Messenger of Allah (peace be upon him) has stated that hearts become rusty, and the way to remove this rust is by remembering Allah.
The Noble Prophet (peace be upon him) described heedlessness as the rust of the heart. This heedlessness is the greatest illness, and the remedy for this ailment is to polish your heart through the remembrance of Allah. Dedicate a little time for the remembrance of Allah—fifteen to twenty minutes, half an hour—whatever time you can easily spare. For the remembrance of Allah…
At this time, recite some Quranic verses. Read a section of (Munjat-e-Maqbool By Hazrat Maulana Ashraf Ali Thanvi RA). Recite one set of “Subhan Allah wa bihamdiHi, Subhan Allah al-Azeem,” one set of the third Kalimah: “Subhan Allah wal Hamdulillah wa la ilaha illallah wa Allahu Akbar,” and one set of the fourth Kalimah: “La ilaha illallah wahdahu la sharika lahu, lahu al-mulk wa lahu al-hamd, yuhyi wa yumit wa huwa ‘ala kulli shay’in qadeer.”
Additionally, recite a set of Istighfar (seeking forgiveness) and a set of Darood Sharif (salutation upon the Prophet). This will take no more than forty minutes.
(From “Dars-e-Shu’b al-Iman,” Volume 1, Page 58).
These sayings have been selected by Hazrat Maulana Faisal Sahib.