The books on Hadith mention very severe punishment for those who neglect salah. From many traditions on the subject, only are reproduced in this chapter. Although a single warning from the most truthful Prphet (May Allah shower peace and blessings upon him) was enough,yet we find that, out of love and mercy for the his followers, he has cautioned them again and again and in various mannerlest they should neglect Salah and suffer the consequences.
Inspite of all of this, alas! We are unmindful of Salah, and we still have the audacity to consider ourselves devotees of the Prophet (May Allah shower peace and blessings upon him) and champions of Islam.
(Virtues of Salah – Shaykh al Hadith Zakariyyah Khandehlawi)