Adbhutasagara 48.61

48.61

liṅgapurāṇabrahmāṇḍapurāṇayorapyevam|
kālāvalyām|
divolkāpatanaṃ paśyennaktaṃ cendradhanustathā|
gamyate tena māsena mṛtyorvadanakoṭaram||

Likewise also in the Liṅgapurāṇa and Brahmāṇḍapurāṇa.
In the Kālāvalī:
"If one sees the falling of a meteor by day, and likewise a rainbow at night,
within a month he goes into the cavity of Death's mouth."