Bhishma said He who takes food only morning and evening at the appointed hours and abstains from all food during the interval, is said to be an abstainer from food.
भीष्म उवाच अन्तरा सायमाशं च प्रातराशं च यो नरः। सदोपवासी भवति यो न भुङ्क्तेऽन्तरा पुनः॥