Shiva Purana
शब्दब्रह्मत्विदं प्राप्य ये केचिदन्यकांक्षिणः ॥ घ्नंति ते मुष्टिनाकाशं कामयंते क्षुधां तृषाम् ॥ ३१॥
If after attaining the Śabdabrahman he were to aspire for other things he will be hitting the sky with his fist, he will be loving hunger and thirst.
english translation
zabdabrahmatvidaM prApya ye kecidanyakAMkSiNaH ॥ ghnaMti te muSTinAkAzaM kAmayaMte kSudhAM tRSAm ॥ 31॥
hk transliteration by Sanscript