'Observed' in the Bible

So Solomon observed the Festival of Tents at that time, as did all of Israel with him. A large assembly came up from as far away as Lebo-hamath and the Wadi of Egypt to appear in the presence of the LORD our God, not just for seven days, but for seven days after that, a total of fourteen days.

Jeroboam was a valiant soldier, and because Solomon observed that the young man was able to get things done, he set him in charge over all of the conscripted labor from the household of Joseph.

"Which way did he go?" their father asked him, since his sons had observed the way that the man of God had taken to return to Judah from Bethel.

Everyone in Israel will mourn for him and will bury him, because he alone from Jeroboam's family will receive a decent burial, because something good was observed in him with respect to the LORD God of Israel out of all the household of Jeroboam!

When Zimri observed that the city had been captured, he retreated into the king's palace, set fire to the citadel, and died when the palace burned down around him

So when the chariot commanders observed Jehoshaphat, they said by mistake, "It's the king of Israel!" and they turned aside to attack him. But Jehoshaphat cried out.