'Observe' in the Bible

And said, I beseech thee, O LORD God of heaven, the great and terrible God, that keepeth covenant and mercy for them that love him and observe his commandments:

please turn your attention to observe carefully and listen to the prayer of your servant today that I am presenting to you day and night on behalf of your servants, the Israelis.

But if you return to Me and carefully observe My commands, even though your exiles were banished to the ends of the earth, I will gather them from there and bring them to the place where I chose to have My name dwell.”

"The rest of the people, the priests, the Levites, the gatekeepers, the singers, the temple servants, and all who separated themselves from the peoples of the lands to [observe] the law of God--their wives, their sons, their daughters, and all who know and understand--

They clave to their brethren, their nobles, and entered into a curse, and into an oath, to walk in God's law, which was given by Moses the servant of God, and to observe and do all the commandments of the LORD our Lord, and his judgments and his statutes;