firstfruits the promise

  Jeremiah 2:1   Moreover the word of the LORD came to me, saying,

  Jeremiah 2:2   Go and cry in the ears of Jerusalem, saying, Thus saith the LORD; I remember thee, the kindness of thy youth, the love of thine espousals, when thou wentest after me in the wilderness, in a land that was not sown.
  Jeremiah 2:3   Israel was holiness unto the LORD, and the firstfruits of his increase: all that devour him shall offend; evil shall come upon them, saith the LORD.