Hudaifa bin Yaman narrated that God's Messenger (may God bless him and grant him peace) said: Islam would extinquish just as the embroidery of a fabric become worn-out so much so that none would know… what prayer is. (Sunan Ibn Majah)

The Prophet (may God bless him and grant him peace) said: "One sign of Doomsday is the abandonment of salah... At that time, O Salman! The most wicked of all sins and irreligiousness will occur. People will abandon salah and adhere to their lust. If you are alive during that period, perform your prayers at their respective times." (Fera Idu Fevaidi'l Fiqr Fi'l Imam al-Mahdi al-Muntadhar, pp. 146-47)

People will encounter such a time that salah [prayers] will be abandoned, buildings will be higher, oaths and curses will be everywhere, bribery and adultery will spread, and the Hereafter will be exchanged for this life. (Muhammad ibn `Abd al-Rasul Barzanji, Al-Isha`ah li Ashrat as-Sa`ah, p. 157)