'Two' in the Bible

Why did the knees welcome me, and why were there two breasts that I might nurse at them?

and reveal to you the secrets of wisdom -- for true wisdom has two sides -- so that you would know that God has forgiven some of your sins.

Only in two things spare me, O God, and then I will not hide from your face:

After the Lord had spoken these things to Job, he said to Eliphaz the Temanite, "My anger is stirred up against you and your two friends, because you have not spoken about me what is right, as my servant Job has.