1 Enoch 78:7

ወሠለስቱ፡ ትኅምስተ፡ ብርሃን፡ ይትወደይ፡ ውስቴታ፡ እስከ፡ ዐሥር፡ ወኀምስ፡ ይትፌጸም፡ ብርሃነ፡ ዚኣሁ፡ ለትእምርተ፡ ዓመት፡ ወይከውን፡ ሠለስተ፡ ትኅምስተ፡ ወይከውን፡ ወርኅ፡ በመንፈቀ፡ ሳብዕተ፡ እድ።

And fifteen parts of light are transferred to her till the fifteenth day (when) her light is accomplished, according to the sign of the year, and she becomes fifteen parts, and the moon grows by (the addition of) fourteenth parts.