《战国策·魏二·秦楚攻魏围皮氏》
于是就背叛秦国而同魏国讲和，魏国就把太子送到楚国做人质。
乃倍秦而与魏，魏内太子于楚。
Thus, he betrayed the State of Qin and made peace with the State of Wei, and the State of Wei sent the crown prince to the State of Chu as a hostage.