Shiva Purana
गणेशश्च गणेशत्वमनेन विधिना गतः ॥ सितचंदनतोयेन लिंगं स्नाप्य शिवं शिवाम् ॥ श्वेतैर्विकसितैः पद्मैः संपूज्य प्रणिपत्य च ॥ ८ ॥
Lord Ganesha also became Lord Ganesha by this method. After bathing the lingam with white sandalwood water, He worshiped them with white blossoming lotuses and bowed down to them.
english translation
gaNezazca gaNezatvamanena vidhinA gataH ॥ sitacaMdanatoyena liMgaM snApya zivaM zivAm ॥ zvetairvikasitaiH padmaiH saMpUjya praNipatya ca ॥ 8 ॥
hk transliteration by Sanscript