Apostolic Tradition 28

1As soon as first-fruits appear, all shall hasten to offer them to the bishop. And he shall offer them, shall give thanks and shall name him who offered them, saying: We give thee thanks, O God, and we offer thee the first-fruits; which thou hast given us to enjoy, nourishing them through thy word, commanding the earth to bring forth her fruits for the gladness and the food of men and all beasts. For all these things we praise thee, O God, and for all things wherewith thou hast blessed us, who for us adornest every creature with divers fruits. Through thy Servant Jesus Christ, our Lord, through whom be to thee glory, world without end. Amen. Only certain fruits may be blessed, namely grapes, the fig, the pomegranate, the olive, the pear, the apple, the mulberry, the peach, the cherry, the almond, the plum. Not the pumpkin, nor the melon, nor the cucumber, nor the onion nor garlic nor anything else having an odour. But sometimes flowers too are offered; here the rose and the lily may be offered, but no other. But for everything that is eaten shall they [who eat it] give thanks to the Holy God, eating unto His glory.