Astanga Hrudaya
धान्यं त्यजेत्तथा शाकं रूक्षसिद्धमकोमलम्। असञ्जातरसं तद्वच्छूष्कं चान्यत्र मूलकात्॥१४२॥
which have lost their properties having become very old- should be rejected. Similarly also with the vegetables, the dishes prepared from them without addition of material 9oil or ghree), which are very hard even after cooking, should be avoided.
english translation
dhAnyaM tyajettathA zAkaM rUkSasiddhamakomalam। asaJjAtarasaM tadvacchUSkaM cAnyatra mUlakAt॥142॥
hk transliteration by Sanscript