Translation of the verse 57 from Surah Yunus : Number of verses 109 - - page 215 - Part 11.
O mankind! There has come to you a good advice from your Lord (i.e. the Quran, ordering all that is good and forbidding all that is evil), and a healing for that (disease of ignorance, doubt, hypocrisy and differences, etc.) in your breasts, - a guidance and a mercy (explaining lawful and unlawful things, etc.) for the believers.
O mankind, there has come to you instruction from your Lord and healing for what is in the breasts and guidance and mercy for the believers.
(10:57) Men! Now there has come to you an exhortation from your Lord, a healing for the ailments of the hearts, and a guidance and mercy for those who believe.