Declension table of mahāvrata

Masculine	Singular	Dual	Plural
Nominative	mahāvrataḥ	mahāvratau	mahāvratāḥ
Vocative	mahāvrata	mahāvratau	mahāvratāḥ
Accusative	mahāvratam	mahāvratau	mahāvratān
Instrumental	mahāvratena	mahāvratābhyām	mahāvrataiḥ mahāvratebhiḥ
Dative	mahāvratāya	mahāvratābhyām	mahāvratebhyaḥ
Ablative	mahāvratāt	mahāvratābhyām	mahāvratebhyaḥ
Genitive	mahāvratasya	mahāvratayoḥ	mahāvratānām
Locative	mahāvrate	mahāvratayoḥ	mahāvrateṣu

Compound mahāvrata -

Adverb -mahāvratam -mahāvratāt