The Māheśvarī-Sūtrāṇi are fourteen sounds which contain all the letters of the Sanskrit alphabet.

Maheshwari Sutras

Lord Shiva, when he performed the cosmic dance called Tandav Nritya for the sages, fourteen sounds (Maheshwari Sutras) were heard from his Damaru (musical instrument), which came to be known as the Śivasūtrajālam..

Sage Panini by the grace of Lord Maheshwara i.e. Shiva composed the work on Sanskrit grammar in a book called the Ashtadhyayi, which means eight chapters.

Maheshwari Sutras (Māheśvarī-Sūtrāṇi), also known as the Shiva Sutras are considered to be the foundation of Sanskrit. Sanskrit Varnamala has been created from the Maheshwari Sutras.

The above is derived from the following:

नृत्तावसाने नटराज-राजो ननादढक्काम् नवपञ्चवारम्।
उद्धर्त्तुकामो सनकादिसिद्धादिनेतद्विमर्शे शिवसूत्रजालम्॥

Nṛttāvasāne naṭarāja-rājo nanādaḍhakkām navapañcavāram।
Uddharttukāmo sanakādisiddhādinetadvimarśe śivasūtrajālam॥

माहेश्वरी-सूत्राणि | Maheshwari Sutras

स्वराः

DevanagariIAST
अइउण्aiuṇ
ऋऌक्ṛḶk
एओङ्eoṅ
ऐऔच्aiauc

व्यञ्जनानि

DevanagariIAST
हयवरट्hayavaraṭ
लण्laṇ
ञमङणनम्ñamaṅaṇanam
झभञ्jhabhañ
घढधष्ghaḍhadhaṣ
जबगडदश्jabagaḍadaś
खफछठथचटतव्khaphachaṭhathacaṭatav
कपय्kapay
शषसर्śaṣasar
हल्hal