Declension table of sahasra

Neuter	Singular	Dual	Plural
Nominative	sahasram	sahasre	sahasrāṇi
Vocative	sahasra	sahasre	sahasrāṇi
Accusative	sahasram	sahasre	sahasrāṇi
Instrumental	sahasreṇa	sahasrābhyām	sahasraiḥ
Dative	sahasrāya	sahasrābhyām	sahasrebhyaḥ
Ablative	sahasrāt	sahasrābhyām	sahasrebhyaḥ
Genitive	sahasrasya	sahasrayoḥ	sahasrāṇām
Locative	sahasre	sahasrayoḥ	sahasreṣu

Compound sahasra -

Adverb -sahasram -sahasrāt