Natyashastra
संहारश्चतुरश्रश्च नकुटे खञ्जके तथा । सन्धिः प्रस्वारसंयुक्ता अन्तरायां स्मृता तथा ॥ १३॥
Saṃhāra and Caturasra belong to the Khañja and Nakuṭa types; and Sandhi together with Prasvāra is regarded as belonging to the Antarā Dhruvā.
english translation
saMhArazcaturazrazca nakuTe khaJjake tathA । sandhiH prasvArasaMyuktA antarAyAM smRtA tathA ॥ 13॥
hk transliteration by Sanscript