Rite of Ascension

The Rite of Ascension was a ritual performed when a Klingon child who had reached the Age of Inclusion symbolically became a warrior. It was required to be followed by the Second Rite of Ascension in less than ten years in order for the Klingon to fully become a warrior. The rite involved the repeated use of painstiks to test the warrior's endurance and resolve. 

Worf underwent his Second Rite of Ascension in 2365. 

Erster Ritus des Aufsteigens Ritos de Ascensión