Sounds like a version of the story that's universal in folk memory - here's an Irish one, Munachar and Manachar

(which begins:

There once lived a Munachar and a Manachar, a long time ago, and it is a long time since it was, and if they were alive now they would not be alive then. They went out together to pick raspberries, and as many as Munachar used to pick Manachar used to eat. Munachar said he must go look for a rod to make a gad to hang Manachar, who ate his raspberries every one; and he came to the rod. "What news the day?" said the rod. "It is my own news that I'm seeking. Going looking for a rod, a rod to make a gad, a gad to hang Manachar, who ate my raspberries every one."