'Three' in the Bible

Seven sons and three daughters had been born to him.

His sons used to travel to each other's houses in turn on a regular schedule and hold festivals, inviting their three sisters to celebrate with them.

While this messenger was still speaking, another came and announced, "The Chaldeans formed three companies, raided the camels, captured the servants, and killed them with swords. Only I alone escaped to tell you."

When Job's three friends heard all these tragedies that happened to him, they each traveled from their home towns to visit him. Eliphaz came from Teman, Bildad came from Shuah, and Zophar came from Naamath. They met together and went to console and comfort him.

These three men stopped responding to Job, because he was claiming to be righteous, in his own opinion.

Furthermore, he was furious with his three friends because they had not answered Job, but instead had condemned him.

but when he saw that there had been no response from those three, he got even more angry.

He also had seven sons and three daughters.