Declension table of ?ṛbhuṣṭhira

Masculine	Singular	Dual	Plural
Nominative	ṛbhuṣṭhiraḥ	ṛbhuṣṭhirau	ṛbhuṣṭhirāḥ
Vocative	ṛbhuṣṭhira	ṛbhuṣṭhirau	ṛbhuṣṭhirāḥ
Accusative	ṛbhuṣṭhiram	ṛbhuṣṭhirau	ṛbhuṣṭhirān
Instrumental	ṛbhuṣṭhireṇa	ṛbhuṣṭhirābhyām	ṛbhuṣṭhiraiḥ ṛbhuṣṭhirebhiḥ
Dative	ṛbhuṣṭhirāya	ṛbhuṣṭhirābhyām	ṛbhuṣṭhirebhyaḥ
Ablative	ṛbhuṣṭhirāt	ṛbhuṣṭhirābhyām	ṛbhuṣṭhirebhyaḥ
Genitive	ṛbhuṣṭhirasya	ṛbhuṣṭhirayoḥ	ṛbhuṣṭhirāṇām
Locative	ṛbhuṣṭhire	ṛbhuṣṭhirayoḥ	ṛbhuṣṭhireṣu

Compound ṛbhuṣṭhira -

Adverb -ṛbhuṣṭhiram -ṛbhuṣṭhirāt