There is nothing I can find in genesis 15.5-6 that says abraham said aman.
I have found out something online about the word amen.
Definition: Amen is an exclamation expressing agreement with a statement. At the end of a prayer it expresses the genuineness of the petition.
More information on this subject here: Meaning of Amen [define Amen]
Amen! - The word that ends a prayer
There's a word at the end of every prayer, the word "Amen". Where did this word come from, why do we say it, and what does it mean?
The Origin of the Word 'Amen'
The word 'Amen' makes its first appearance in the Bible under the most solemn circumstances. When a husband accused his wife of adultery, and she protested her innocence, and she had not been caught in the act, the matter was settled by God under the test of bitter water (Num 5:12-31). The woman was taken to the priest, and the priest put her under oath. She submitted to a ceremony in which she drank some water containing dust from the tabernacle floor. If she had committed adultery, she was be cursed with a wasting disease, but if she did not get sick, then she was proven innocent and her husband was proven wrong.
During the ceremony, when the priest pronounced the curse, the woman was required by God to say, "Amen, Amen". (Num 5:22). That is the first occurrence of the word in scripture. The Lord commands it to be said by a person who is yielding herself to examination by him in his presence.
The word 'Amen' probably goes back a long way. Some think it is of pagan origin (there was an Egyptian god called Amen-Ra). Perhaps that ancient usage reflects an even earlier existence of the word. As to its use in the Bible, however, we first encounter the word in this commandment spoken by the Lord (Num 5:22).
Why do we say amen?
What does amen mean?
To find out the answers you can read them here:
The Last Word - Amen - Origin, Use, and Meaning
LLJ :love: :rainbow: :rose:
:love: Colossians 3:2-3, "Set you minds on things above, not on earthy things. For you died, and your life is now hidden with Christ in God." (NIV) :angel: