《元史·本纪·卷十》
十三日，范文虎上奏说： 臣奉命征伐日本，但最近朝廷派遣周福、栾忠和日本僧人一起带着诏书前去招降该国，约定明年四月为答复的日期，等他答复是不是归顺，才适于进军。 
戊子，范文虎言： 臣奉诏征讨日本，比遣周福、栾忠与日本僧赍诏往谕其国，期以来年四月还报，待其从否，始宜进兵。 
On the 13th, Fan Wenhu memorialized to the throne, saying: "I accept the order to launch an expedition against Japan. Recently, the imperial court has sent Zhou Fu, Luan Zhong and a Japanese monk to bring an imperial edict to that country to summon its surrender, and has arranged a date for a reply next April. Only after Japan has replied whether or not it will submit should the army advance." 