´It was narrated that Al-Walid bin Abi Malik said:` "Our companions narrated to us that Abu 'Ubaidah said: 'Fasting is a shield, so long as you do not damage it."'
Hadith ReferenceSunan an-Nasa'i / The Book of Fasting / Hadith: 2237
Hadith Gradingالألبانی:صحيح الإسناد مقطوع | زبیر علی زئی:حسن