R'uustai

R'uustai was a Klingon ritual that was considered a rite of bonding. The rite involved two individuals who would join together as brothers which allows one to enter the other's House. The ceremony itself involves candles which are lit and a sash being worn by the one entering the others House. The words "SoS jIH batlh SoH" are also spoken which honors the mothers of both participants as they are bonded together as one family. (TNG episode: Icarus Factor)