1 Enoch 74:10

ወበእማንቱ፡ መዋዕል፡ ኀምስቱ፡ ዓመት፡ ወይበጽሖ፡ ለፀሓይ፡ ሠላሳ፡ መዋዕል፡ ወኵሎሙ፡ መዋዕላት፡ ይበጽሕዎ፡ ለአሐዱ፡ ዓመት፡ እምእልኩ፡ ኀምስቱ፡ ዓመት፡ ተመሊኦሙ፡ ይከውኑ፡ ሠለስተ፡ ምእተ፡ ወስሳ፡ ወረቡዐ፡ መዋዕለ።

And if five years are added together the sun has an overplus of thirty days, and all the days which accrue to it for one of those five years, when they are full, amount to 364 days.