One day Cúchulainn overheard Cathbad the druid of King Conchobar mac
instruction in the lore of druidism, and one of his pupils asked what day would be
propitious. He answered that any young man taking arms that day would gain a greater
name and reputation than any other hero, but that his life would be short.
Cúchulainn immediately asked King Conchobar for a chariot and some weapons, declaring
that the druid had predicted this day as a day for the arming of a hero.
On this his first day of bearing arms he killed three champions who had long harassed
the warriors of Ulster and brought back their heads to the hall of the King. At this
time he was reputedly just seven years old.