In a raid around 1177, Temujin was captured by his father’s former allies, the Tayichi’ud, and enslaved, reportedly with a cangue (a sort of portable stocks). With the help of a sympathetic guard, he escaped from the ger (yurt) at night by hiding in a river crevice. The escape earned Temüjin a reputation. Soon, Jelme and Bo’orchu joined forces with him. They and the guard’s son Chilaun eventually became generals of Genghis Khan.
John Man juvenile book, 2014; search by Temujin, cangue, and there are different versions from translations of the Secret History of the Mongols.