The word 'faith' does not appear in scripture until Genesis 22 talking of Abraham, so was not specifically mentioned that Abel, Enoch, Noah had faith in their testimony stories.
Paul in Hebrews said those names did have faith and gives the evidentiary arguments that they did have faith. So people like Zacharias and Elizabeth also had faith, they had the substance of things hoped for, evidence of things not see happen in their lives. So they must have had faith which pleased God.
Hebrews 11
1 Now faith is the substance of things hoped for, the evidence of things not seen.
2 For by it the elders obtained a good report.
3 Through faith we understand that the worlds were framed by the word of God, so that things which are seen were not made of things which do appear.
4 By faith Abel offered unto God a more excellent sacrifice than Cain, by which he obtained witness that he was righteous, God testifying of his gifts: and by it he being dead yet speaketh.
5 By faith Enoch was translated that he should not see death; and was not found, because God had translated him: for before his translation he had this testimony, that he pleased God.
6 But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him.
7 By faith Noah, being warned of God of things not seen as yet, moved with fear, prepared an ark to the saving of his house; by the which he condemned the world, and became heir of the righteousness which is by faith.