Declension table of ?mantrasūtra

Neuter	Singular	Dual	Plural
Nominative	mantrasūtram	mantrasūtre	mantrasūtrāṇi
Vocative	mantrasūtra	mantrasūtre	mantrasūtrāṇi
Accusative	mantrasūtram	mantrasūtre	mantrasūtrāṇi
Instrumental	mantrasūtreṇa	mantrasūtrābhyām	mantrasūtraiḥ
Dative	mantrasūtrāya	mantrasūtrābhyām	mantrasūtrebhyaḥ
Ablative	mantrasūtrāt	mantrasūtrābhyām	mantrasūtrebhyaḥ
Genitive	mantrasūtrasya	mantrasūtrayoḥ	mantrasūtrāṇām
Locative	mantrasūtre	mantrasūtrayoḥ	mantrasūtreṣu

Compound mantrasūtra -

Adverb -mantrasūtram -mantrasūtrāt