Shiva Purana
करपूजानिवृत्तानां स्वभोज्यं तु निवेदयेत् । निवृत्तानां परं सूक्ष्मं लिंगमेव विशिष्यते ३५ ।
He who has renounced the world (the Nivṛtta) shall perform Karapūjā (worship in the palm of the hand). He shall offer that food to the deity which he is accustomed to take himself. The subtle phallic image is specially recommended for the Nivṛttas.
english translation
karapUjAnivRttAnAM svabhojyaM tu nivedayet । nivRttAnAM paraM sUkSmaM liMgameva viziSyate 35 ।
hk transliteration by Sanscript