By fasting, learned men quickly bring all of the senses except the tongue under control, because by abstaining from eating such men are afflicted with an increased desire to gratify the sense of taste.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
इन्द्रियाणि जयन्त्याशु निराहारा मनीषिणः । वर्जयित्वा तु रसनं तन्निरन्नस्य वर्धते
indriyāṇi jayantyāśu nirāhārā manīṣiṇaḥ | varjayitvā tu rasanaṃ tannirannasya vardhate
SB 11.8.20