The Rite of MajQa is a Klingon ritual that involves lengthy meditations in the Caves of No'Mat. The ritual is generally undertaken for the first time at a young age. The participant in the ritual seeks to gain a vision of his past or future, visions of family are considered particularly powerful and important.
Worf undertook the Rite of MajQa as a youth when his adoptive parents arranged for him to travel to Qo'noS. (TNG: "Birthright, Part I")