《旧五代史·后梁·末帝纪上》
张彦让贺德伦告诉城中军民说 ：可依照河东晋人纪元，称天十二年，以后如果有人与河南梁人有书信往来，就令所在部门处置。 
彦使德伦告谕军城曰： 可依河东称天祐十三年，此后如有人将文字于河南往来，便仰所在处置。 
Zhang Yan asked Helun to tell the military and civilians in the city: they can follow the Jin of Hedong's era, and call it the twelfth year of Tian. In the future, if anyone exchanges letters with the Liang of Henan, the relevant departments will handle it.