Answer:
Almighty Allah States:”O you who believe! Fasting has been prescribed upon you as it was prescribed upon those before you so that you practice self-restraint.” (surah 2 verse 183) The very essence of fasting is to inculcate the quality of taqwa and to suppress our desires.Hence,one must guard all the limbs whilst fasting and stay away from all haram speech and actions.

Answered by : Mufti AK Hoosen,Ustaad Darul Uloom, 20 years.