'Cling' in the Bible

You are to fear the LORD your God and serve him. Cling to him and swear by his name.

"If you carefully observe all of these commands that I'm giving you to do to love the LORD your God, to walk in all his ways, and to cling to him,

You must follow the LORD your God, fear him, observe his commandments, listen to his voice, serve him, and cling to him.

You'll cling to life, being fearful by both night and day, with no assurance of survival.

Love the LORD your God, obey his voice, and cling to him, because he is your life even your long life so that you may live in the land that the LORD promised to give Abraham, Isaac, and Jacob."