Shiva Purana
अंगुष्ठद्वयमारभ्य तलांतं परिमार्जयेत् ॥ ओमित्युक्त्वाथ देवेशि करन्यासं समारभेत् ॥ ६३॥
Beginning with the two thumbs and ending with the palms, the hands are wiped off. O goddess, śaying “Om” he shall begin the Nyāsa of the hands.
english translation
aMguSThadvayamArabhya talAMtaM parimArjayet ॥ omityuktvAtha devezi karanyAsaM samArabhet ॥ 63॥
hk transliteration by Sanscript