'Observing' in the Bible

Now John’s disciples and the Pharisees were fasting [as a ritual]; and they came and asked Jesus, “Why are John’s disciples and the disciples of the Pharisees fasting, but Your disciples are not doing so?”

Jesus entered Jerusalem and went to the temple [enclosure]; and after looking around at everything, He left for Bethany with the twelve [disciples], because it was already late [in the day].

Mary Magdalene and Mary the mother of Joses were [carefully] watching to see where He was laid.