Shiva Purana
संपूज्य लिङ्गं तैर्द्रव्यैर्निर्माल्यमपनोदयेत् ॥ प्रक्षाल्य पुष्पं शिरसि न्यसेत्तस्य विशुद्धये ॥ २० ॥
After worshiping the deity with these objects, one should remove the garland. Wash the flower and place it on the head for purification.
english translation
saMpUjya liGgaM tairdravyairnirmAlyamapanodayet ॥ prakSAlya puSpaM zirasi nyasettasya vizuddhaye ॥ 20 ॥
hk transliteration by Sanscript