Amongst all of Imam’s duties and responsibilities, he gave great importance to reciting Quran and supplications and to praying on time. Imam would recite Quran between three and five times daily. During the Holy month of Ramadan he would complete the recitation of the Quran thrice.
Mostly he would recite supplications from Mafaatihul Jinaan. On Thursday nights he would recite Dua-Kumail.
I remember one day before Imam passed away, one of the ladies of his household asked me to sit besides him and recite a supplication. I recited Dua-e-Adeela which is appropriate at the time of death. I read it from Imam's Mafaatihul Jinaan. Whilst reading, I noticed a page marked in the book. I saw that it was Dua-Ahad that had been marked. This is the supplication that if some recites for 40 days they will arise from their grave at the time of the coming of Imam Mahdi (a.s) and will be able to meet him.
(A memoirs by Ayatollah Tawassuli about Imam Khomeini)