《史记·三十世家·燕召公世家》
他到齐国的第四年，齐国派高偃去到晋国，请求联合讨伐燕国，送燕惠公回国为君。
四年，齐高偃如晋，请共伐燕，入其君。
In his fourth year in the Qi state, the state of Qi sent Gao Yan to Jin to request a joint campaign against the state of Yan and to restore the Duke of Yan Hui to the throne.