The bhagat bani is the strongest evidence for what Sikh scripture was trying to be. Farid — the Punjabi Sufi of Pakpattan, or possibly a successor writing in his name, which Punjabi scholars debate — supplies the oldest surviving verse in the language, sombre couplets about death and restraint. Namdev, a Marathi calico-printer and tailor of the Varkari tradition, supplies sixty-two compositions in a completely different register. Neither was a Sikh; neither was retrospectively adopted. Guru Arjan arranged them by raag alongside the Gurus' own work, so that in performance a congregation cannot always tell who wrote what without checking. The theological claim implicit in that layout — that revelation is not the property of one community — is the one thing every Sikh school agrees on, and it is the reason the shrine of Farid at Pakpattan in Pakistan still receives Sikh pilgrims.