Deuteronomy 13:6בַּסֵּתֶר
If your very own brother, or your son or daughter, or the wife you embrace, or your closest friend secretly entices you, saying, “Let us go and worship other gods” (which neither you nor your fathers have known,
Job 13:10בַּסֵּתֶר
Surely He would rebuke you if you secretly showed partiality.
Psalm 27:5בְּסֵתֶר
For in the day of trouble He will hide me in His shelter; He will conceal me under the cover of His tent; He will set me high upon a rock.
Proverbs 21:14בַּסֵּתֶר
A gift in secret soothes anger, and a covert bribe pacifies great wrath.
Isaiah 45:19בַסֵּתֶר
I have not spoken in secret, from a place in a land of darkness. I did not say to the descendants of Jacob, ‘Seek Me in a wasteland.’ I, the LORD, speak the truth; I say what is right.
Jeremiah 37:17בַּסֵּתֶר
Later, King Zedekiah sent for Jeremiah and received him in his palace, where he asked him privately, “Is there a word from the LORD?” “There is,” Jeremiah replied. “You will be delivered into the hand of the king of Babylon.”

Brown-Driver-Briggs

סֵ֫תֶר n.[m.] covering, hiding-place, secrecy

Sources: Brown-Driver-Briggs (1906, public domain) from the Open Scriptures Hebrew Lexicon (CC BY 4.0), glosses from STEPBible TBESH (CC BY 4.0); STEPBible TAHOT (Hebrew Bible, Leningrad Codex, CC BY 4.0); the Berean Standard Bible (public domain). Reformatted by Word Study, wording unchanged. All sources and licenses.