Declension table of sādhu

Neuter	Singular	Dual	Plural
Nominative	sādhu	sādhunī	sādhūni
Vocative	sādhu	sādhunī	sādhūni
Accusative	sādhu	sādhunī	sādhūni
Instrumental	sādhunā	sādhubhyām	sādhubhiḥ
Dative	sādhune	sādhubhyām	sādhubhyaḥ
Ablative	sādhunaḥ	sādhubhyām	sādhubhyaḥ
Genitive	sādhunaḥ	sādhunoḥ	sādhūnām
Locative	sādhuni	sādhunoḥ	sādhuṣu

Compound sādhu -

Adverb -sādhu