'Traditions' in the Bible

(For the Pharisees and all the Jews do not eat unless they wash their hands {ritually}, [thus] holding fast to the traditions of the elders.

And [when they come] from the marketplace, they do not eat unless they wash. And there are many other [traditions] which they have received [and] hold fast to--[for example,] the washing of cups and pitchers and bronze kettles and dining couches.)

Now I praise you that you remember me [in] all [things], and just as I handed over to you the traditions, you hold fast to [them].

and was progressing in Judaism beyond many contemporaries in my nation, [because] I was a far more zealous adherent of the traditions handed down by my forefathers.

So then, brothers, stand firm and hold fast to the traditions which you were taught, whether by [spoken] word or by letter from us.