'Deficient' in the Bible

But Moses said to the Lord, “Look, [my own people] the Israelites have not listened to me; so how then will Pharaoh listen to me, for I am unskilled and inept in speech?”

But Moses said before the Lord, “Look, I am unskilled and inept in speech; how then will Pharaoh listen to me and pay attention to what I say?”

TEKEL means that you have been weighed in the balance and found deficient.