Jawamiʿ al-hikayat wa lawamiʿ al-riwayat 29: Conquest of Ghor by Sultan Mas'ud.

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III. xii. 9.
An injured man came to Sultan Mas'ud and complained that as he was proceeding to Ghor, the chief of the country seized and forcibly took from him all his property. A letter was consequently written to the chief directing the restoration of the man's property. The man got the letter and took it to the chief of Ghor. The chief was vexed, and ordered him to be punished. The man returned to Ghaznin and complained once more against the Ghorians. The Sultan directed that another letter should be written in threatening terms, that if the chief did not in every way satisfy the man, he would march against him and humble his pride. The man said, "O king, direct that the letter be written in as small a compass as possible, because I shall be forced to swallow it, and if there is but a small quantity of paper it will be the easier to get down." Sultan Mas'ud was extremely incensed at this, and on the same day pitched his tents, and marched against Ghor. He took possession of the country, and chastised the chief, returning to the poor man more than had been taken from him. The Amir of Ghor was thus punished for his tyranny.