Ali (رضي الله عنه) said:
“Fasting is not abstaining from food and drink; rather fasting is [abstaining] from lying, falsehood and Laghw (evil speech/nonsense/gossip).” [Al Musanaf - Ibn Abi Shaybah: 2/224]
‘Abdullaah ibn ‘Umar (رضي الله عنهما) said:
“The fortitude of the religion and what it is built upon is the Salaat and Zakaat, one should not differentiate between the two of them, also the pilgrimage to Al Bayt Al Haraam and fasting Ramadaan. Indeed the most righteous of actions is giving charity and fasting.” [Al Musanaf - Ibn Abi Shaybah: 11/47]
Jaabir ibn ‘Abdullaah (رضي الله عنهما) said:
“If you fast, then your hearing and sight should also fast, your tongue [must also fast] from lying, [you must fast] from sins and abandon harming servants. You should be calm and dignified on the day that you fast. Do not make a day that you fast similar to a day that you don’t.” [Al Bukharee and Muslim]
Abu Dhar (رضي الله عنه) said:
“If you fast, safeguard yourself as much as you possibly can.” [Al Musanaf - Ibn Abi Shaybah: 2/124]
Abu Sa'eed al-Khudree (radhi-yallaahu 'anhu) narrated that the Messenger of Allah (sal-Allaahu `alayhi wa sallam) said:
((There is not a servant who fasts a day in the way of Allah, except that Allah removes his face from the Fire by the distance of seventy years because of that)).
Bukhari - Volume 6, Page 35, Muslim - Number 1153
'Uthmaan ibn Abil-'Aas (radhi-yallaahu 'anhu) narrated that the Messenger of Allah (sal-Allaahu `alayhi wa sallam) said:
((Fasting is a shield with which a servant protects himself from the Fire)).
Ahmad - Volume 3, Pages 241 and 296
Abu Umaamah (radhi-yallaahu 'anhu) said:
((O Messenger of Allah tell me of an action by which I may enter Paradise?))
He (sal-Allaahu `alayhi wa sallam) said:
((Take to fasting, there is nothing like it)).
an-Nasaa.ee - Volume 4, Page 165, Ibn Hibbaan - Page 232, al-Haakim - Volume 1, Page 421