Musar sur La Genèse 25:23

This is what Rebbi Yehuda praised himself in the statement I quoted, that he did not derive pleasure from this world, not even for his little finger, although he was Prince of Israel and his table was necessarily a table of kings due to the dignity of his position, as our sages of blessed memory taught: "'two nations are in your womb' (Bereishis 25:23) - this refers to Rebbi and Antoninus, from whose table neither lettuce, nor radish nor cucumber was ever absent either in summer or winter" (Avodah Zarah 11a). This was likewise the case for Chizkiyahu, King of Yehuda.