Hasula (adjective) [from has] is rather doubtful ("of charming speech"? or "smiling"?). It occurs in (corrupted) verse at Ja VI 503 = Ap 40 (and 307), which is to be read as "aḷāra-bhamukhā (or °pamhā) hasulā sussoññā tanu-majjhimā." See Kern's remarks at Toev. sub voce hasula.