Narapatijayacarya 3.1.3.84

The designations of the lunar days starting with the phoneme's tithi are 'birth', 'loss', and 'death'; / in 'birth' there is fear, in 'loss' sickness, and in 'death' death occurs without doubt.

"Beginning with ka", etc.: The phonemes beginning with ka and ending with da—ka, kha, ga, gha, ṅa; ca, cha, ja, jha, ña; ṭa, ṭha, ḍa, ḍha, ṇa; ta, tha, da—and likewise the five short vowels—a, i, u, e, o—these are strong in the bright fortnight. The remainder—dha, na, pa, pha, ba, bha, ma; ya, ra, la, va; śa, ṣa, sa, ha; [long vowels] ā, ī, ū, ai, au, aṃ, aḥ—these are strong in the dark fortnight. "Single sound", etc.: Where the sound of both is one, and the two phonemes at the beginning of the names belong to different fortnights, the bright and dark fortnights, there the strength of the fortnight is to be taken according to the division between bright and dark. As in the case of Kamalendra and Candrendra, who begin with the letters ka and ca, the phoneme-sound is one, the vowel a; the letter ka is strong in the bright fortnight, and the letter ca is strong in the dark fortnight.