So then you assert that nobody from the Old Testament was saved?
You really don’t understand the difference between the Old and New Testament?
The below along with the Romans reference I posted earlier to you should address your question of OT believers:
John 8:54-59 NASB
Jesus answered, “If I glorify Myself, My glory is nothing; it is My Father who glorifies Me, of whom you say, ‘He is our God’; and you have not come to know Him, but I know Him; and if I say that I do not know Him, I will be a liar like you, but I do know Him and keep His word. Your father Abraham rejoiced to see My day, and he saw it and was glad.” So the Jews said to Him, “You are not yet fifty years old, and have You seen Abraham?” Jesus said to them, “Truly, truly, I say to you, before Abraham was born, I am.” Therefore they picked up stones to throw at Him, but Jesus hid Himself and went out of the temple.