Declension table of vrata

Masculine	Singular	Dual	Plural
Nominative	vrataḥ	vratau	vratāḥ
Vocative	vrata	vratau	vratāḥ
Accusative	vratam	vratau	vratān
Instrumental	vratena	vratābhyām	vrataiḥ vratebhiḥ
Dative	vratāya	vratābhyām	vratebhyaḥ
Ablative	vratāt	vratābhyām	vratebhyaḥ
Genitive	vratasya	vratayoḥ	vratānām
Locative	vrate	vratayoḥ	vrateṣu

Compound vrata -

Adverb -vratam -vratāt