'Observed' in the Bible

(For the Pharisees and all of the Jews do not eat unless they carefully wash their hands, holding firmly to the traditions of the elders;

So the Pharisees and scribes asked Jesus, “Why do Your disciples not live their lives according to the tradition of the elders, but [instead] eat their bread with [ceremonially] unwashed hands?”

And he replied to Him, “Teacher, I have [carefully] kept all these [commandments] since my youth.”