Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
ahmad-zuhd:422ʿAbdullāh > Bī > Haytham b. Ḥārithah > Ismāʿīl b. ʿAyyāsh > Sulaymān b. Sulaym > Yaḥyá b. Jābir > Yazīd b. Maysarah

[Machine] The food of Yahya (John), ﷺ and his father Zakariyya, was locusts and the hearts of trees. He used to say: "Who has a better provision than you, O Yahya? Your food is locusts and the hearts of trees."  

الزهد لأحمد:٤٢٢حَدَّثَنَا عَبْدُ اللَّهِ حَدَّثَنِي أبِي أَخْبَرَنَا هَيْثَمُ بْنُ حَارِثَةَ أَخْبَرَنَا إِسْمَاعِيلُ بْنُ عَيَّاشٍ عَنْ سُلَيْمَانَ بْنِ سُلَيْمٍ عَنْ يَحْيَى بْنِ جَابِرٍ عَنْ يَزِيدَ بْنِ مَيْسَرَةَ قَالَ

كَانَ طَعَامُ يَحْيَى بْنِ زَكَرِيَّا عَلَيْهِمَا السَّلَامُ الْجَرَادُ وَقُلُوبُ الشَّجَرِ وَكَانَ يَقُولُ مَنْ أَنْعَمُ مِنْكَ يَا يَحْيَى طَعَامُكَ [69] الْجَرَادُ وَقُلُوبُ الشَّجَرِ