have reason

verb2

1. •
   To have grounds, justification etc. (to do something, or for something).

   • The finance minister had reason to be exasperated. Britain's economic future hinges on Europe, and this is no time for animus. — 2008
2. •
   (no longer used) To be right.

   • They would have no man use it as an interjection or exclamation, not to be alleaged as a witnesse or comparison, wherein I find they have reason. — 1603