The Zafarnama is a document written from the worst position imaginable. Guru Gobind Singh had lost Anandpur, all four sons, his mother and most of his followers, and he wrote to the man responsible in elegant Persian verse, addressing him not as a supplicant but as a witness against an oath-breaker — Aurangzeb had sworn on the Quran to grant safe passage and then attacked. The letter is an indictment of a ruler's religion by the standard of that religion. Its most quoted couplet sets the condition under which force becomes lawful, and it is cited in every Sikh argument about political violence, by all sides. Aurangzeb is reported to have summoned the Guru after reading it and died before any meeting; the letter is preserved as part of the Dasam Granth and recited annually at Takht Damdama Sahib.