SB 7.12.18

na kṛṣṭa-pacyam aśnīyād
 akṛṣṭaṁ cāpy akālataḥ
agni-pakvam athāmaṁ vā
 arka-pakvam utāharet
Synonyms: 
na — not; kṛṣṭa-pacyam — grains grown by tilling of the field; aśnīyāt — one should eat; akṛṣṭam — grains that have grown without tilling of the field; ca — and; api — also; akālataḥ — ripened untimely; agni-pakvam — grains prepared by being cooked in fire; atha — as well as; āmam — mango; — either; arka-pakvam — food ripened naturally by the sunshine; uta — it is so enjoined; āharet — the vānaprastha should eat.
Translation: 
A person in vānaprastha life should not eat grains grown by tilling of the fields. He should also not eat grains that have grown without tilling of the field but are not fully ripe. Nor should a vānaprastha eat grains cooked in fire. Indeed, he should eat only fruit ripened by the sunshine.