Natyashastra
अलपल्लवसंस्थानावुर्ध्वास्यौ पद्मकोशकौ । अरालखटकाख्यौ चाप्यरालखटकामुखौ ॥ १८९॥
The two hands, positioned in the Alapallava stance, are raised upwards and shaped like Padmakośa. They are also known as Arālakhaṭakā, or Arālakhaṭakāmukha hands.
english translation
alapallavasaMsthAnAvurdhvAsyau padmakozakau । arAlakhaTakAkhyau cApyarAlakhaTakAmukhau ॥ 189॥
hk transliteration by Sanscript