1 Chronicles 28:19בִּכְתָב
“All this,” said David, “all the details of this plan, the LORD has made clear to me in writing by His hand upon me.”
2 Chronicles 2:11בִּכְתָב
Then Hiram king of Tyre wrote a letter in reply to Solomon: “Because the LORD loves His people, He has set you over them as king.”
Ezra 4:7וּכְתָב
And in the days of Artaxerxes king of Persia, Bishlam, Mithredath, Tabeel, and the rest of his associates wrote a letter to Artaxerxes. It was written in Aramaic and then translated.
Nehemiah 7:64כְתָבָם
These men searched for their family records, but they could not find them and so were excluded from the priesthood as unclean.
Esther 1:22כִּכְתָבָהּ
He sent letters to all the provinces of the kingdom, to each province in its own script and to each people in their own language, proclaiming that every man should be master of his own household.
Ezekiel 13:9וּבִכְתָב
My hand will be against the prophets who see false visions and speak lying divinations. They will not belong to the council of My people or be recorded in the register of the house of Israel, nor will they enter the land of Israel. Then you will know that I am the Lord GOD.

Brown-Driver-Briggs

כְּתָב n.m. writing

1. register, enrolment

2. = mode of writing, character, letter

3. = letter

4. of a royal enactment, edict

5. of a writing with divine authority

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.