Mahabharata 6.3.28

चतुर्दशीं पञ्चदशीं भूतपूर्वां च षोडशीम्इमां तु नाभिजानामि अमावास्यां त्रयोदशीम्

caturdaśīṃ pañcadaśīṃ bhūtapūrvāṃ ca ṣoḍaśīmimāṃ tu nābhijānāmi amāvāsyāṃ trayodaśīm

Our plain-language meaning of this verse is waiting for scholar review.