The palm leaf manuscript with the signature Schoemann I 21 is dated 1467 and is therefore one of the oldest known manuscripts known manuscripts of Java. As a codex unicus it contains the Śaiva text Dharma Pātañjala, in which a dialogue between Śiva and his son Kumāra is reproduced. The text is mainly written in Old Javanese with some interspersed Sanskrit verses. In the 19th century, this manuscript as part of the abandoned collection of the priest Windu Sono and was rediscovered via the collection of Carl Schoemann (1806-77) and came to the SBB-PK. The script and material of the manuscript demonstrate how texts spread across a network of writing workshops and hermitages throughout Java. The manuscript is also evidence of the dissemination of theoretical knowledge about the yoga system of Patañjali in pre-Islamic times, which is amalgamated with a tantric Śaiva theological framework. Presumably the text is probably the work of a single innovative author.