Shiva Purana
यो ऽन्यथा कुरुते मोहात्स विनश्यति दुर्मतिः ॥ तस्मात्सर्वप्रकारेण गुरुः शिष्यं परीक्षयेत् ॥ १५ ॥
He who performs otherwise is the wicked person who perishes. Hence the preceptor shall test the disciple in every respect.
english translation
yo 'nyathA kurute mohAtsa vinazyati durmatiH ॥ tasmAtsarvaprakAreNa guruH ziSyaM parIkSayet ॥ 15 ॥
hk transliteration by Sanscript