Shiva Purana
निर्गम्य पावके बाह्ये लीनं बिंबाकृति स्मरेत् ॥ आज्यसंस्कारपर्यंतमन्वाधानपुरस्सरम् ॥ १७ ॥
After leaving the fire, one should remember the form of a bimba absorbed in the external fire. followed by the invocation up to the ritual of the sacrificial fire.
english translation
nirgamya pAvake bAhye lInaM biMbAkRti smaret ॥ AjyasaMskAraparyaMtamanvAdhAnapurassaram ॥ 17 ॥
hk transliteration by Sanscript