4.16 Rule of Sheva IV: Names of God

When a prefix is added to אלֹהִים and the Tetragrammaton, the vowel changes are irregular:

• With אֱלֹהִים the aleph becomes quiescent after a prefix:
  • אֱלֹהִים + לְ = לֵאלֹהִים
• With the Tetragrammaton, the prefixed letter with take a Patach, with nothing under the Yod:
  • בַיהוָה
  • You can see an example of this in Ruth 1:21: וַֽיהוָה֙