'Watching' in the Bible

Now when the centurion, and they that were with him, watching Jesus, saw the earthquake, and those things that were done, they feared greatly, saying, Truly this was the Son of God.

Blessed are those servants, whom the lord when he cometh shall find watching: verily I say unto you, that he shall gird himself, and make them to sit down to meat, and will come forth and serve them.

Praying always with all prayer and supplication in the Spirit, and watching thereunto with all perseverance and supplication for all saints;