Shiva Purana
सर्वमंगलसंयुक्तं लिंगं तत्राधिवासयेत् ॥ पञ्चरात्रं त्रिरात्रं वाप्येकरात्रमथापि वा ॥ १४ ॥
There one should place a linga containing all auspicious things. Five nights, three nights or one night.
english translation
sarvamaMgalasaMyuktaM liMgaM tatrAdhivAsayet ॥ paJcarAtraM trirAtraM vApyekarAtramathApi vA ॥ 14 ॥
hk transliteration by Sanscript