《资治通鉴·唐纪·唐纪二十七》
宋与苏相处得很好，苏遇事多谦让宋，宋每提出什么意见，苏也尽力襄助。
璟与苏颋相得甚厚，颋遇事多让于璟，颋每论事则颋为之助。
Song and Su got along very well. Su often gave in to Song, and Song always helped as much as possible when he made suggestions.