It is narrated from Imam Sajjad (AS) who said: The person who desires paradise, quickens his/her pace for doing good deeds, and tramples on false desires. And whoever fears the hellfire, repents to Allah (SWT) from his/her own sins, and avoids (committing) sins, and anything that is considered as Haram [1]. In another narration, Imam Sajjad (AS) said: The most important and outstanding endeavours are to observe decencies of stomach and the private parts (of the body) from Haram and doubtful things [2].
[1] Beharul Anwaar, Vol. 75, Page 139, hadith 3, and Tohaful Oqool, Page 203.
[2] Meshkatul Anwaar, Page 157
source : shafaqna.com