Skandapurana 16.207.20

16.207.20

viśeṣato mahākṣetre sarvapātakanāśane ..
citikāṣṭhaṃ ca vai spṛṣṭvā yajñayūpāṃstathaiva ca ..
vedavikrayakartāraṃ spṛṣṭvā snānaṃ vidhīyate .. 7.1.207.20 ..

Especially in a great sacred field that destroys all sins: / having touched wood from a funeral pyre, or sacrificial posts, / or having touched someone who sells the Veda, a ritual ablution is prescribed. // 7.1.207.20