उमामहेश्वरव्रतं—पञ्चाक्षरमन्त्रस्य माहात्म्यं, न्यासः, जपविधिः, सदाचारः, विनियोगः
औदर्यैर्व्याधिभिः सर्वैर् मासेनैकेन मुच्यते एकादशेन भुञ्जीयाद् अन्नं चैवाभिमन्त्रितम्
audaryairvyādhibhiḥ sarvair māsenaikena mucyate ekādaśena bhuñjīyād annaṃ caivābhimantritam
食用以真言加持之食,能于一月之内解脱一切由腹部失调所生诸病。此等清净之食,当在遵行十一种仪则(ekādaśa-vidhi)之后受用。
Suta Goswami (narrating Śaiva ritual discipline to the sages of Naimiṣāraṇya, drawing on internal Purāṇic instruction)
It presents Śiva-prasāda (mantra-empowered food) as a purifying support for the sādhaka—strengthening the body so the Pashu (individual soul) can steadily perform Liṅga-pūjā and progress toward Pati (Śiva).
Śiva is implied as the supreme purifier whose mantra transforms ordinary food into a sanctifying medium, loosening pasha (bondage) expressed even as bodily disorder and restoring harmony conducive to sādhanā.
The practice is consuming abhimantrita anna—food consecrated with Śiva-mantra—along with an ekādaśa (elevenfold) regimen of discipline, functioning as a vrata-based support to Śaiva sādhanā.