《资治通鉴·晋纪·晋纪十一》
朝廷诏令任命索为骠骑大将军、尚书左仆射、录尚书事，奉制书行事。
诏加索纟林骠骑大将军、尚书左仆射、录尚书，承制行事。
The imperial court issued an edict appointing Suo as General of Agile Cavalry, Left Minister of the Imperial Secretariat, and Recorder of Imperial Secretariat Affairs, and to act in accordance with the imperial edict.