Shiva Purana
द्वयं ममैव संसिद्धं न मदन्यस्य कस्यचित् । तस्मादीशत्वमन्येषां युवयोरपि न क्वचित् ३२ ।
These two are present only in me and not in anyone else. Hence no one else, not even you too can claim Īśatva (Īśa-hood).
english translation
dvayaM mamaiva saMsiddhaM na madanyasya kasyacit । tasmAdIzatvamanyeSAM yuvayorapi na kvacit 32 ।
hk transliteration by Sanscript