Exodus 12:21הַפָּסַח
Then Moses summoned all the elders of Israel and told them, “Go at once and select for yourselves a lamb for each family, and slaughter the Passover lamb.
Numbers 9:2הַפָּסַח
“The Israelites are to observe the Passover at its appointed time.
Deuteronomy 16:1פֶּסַח
Observe the month of Abib and celebrate the Passover to the LORD your God, because in the month of Abib the LORD your God brought you out of Egypt by night.
Joshua 5:10הַפֶּסַח
On the evening of the fourteenth day of the month, while the Israelites were camped at Gilgal on the plains of Jericho, they kept the Passover.
2 Kings 23:21פֶסַח
The king commanded all the people, “Keep the Passover of the LORD your God, as it is written in this Book of the Covenant.”
2 Chronicles 30:1פֶּסַח
Then Hezekiah sent word throughout all Israel and Judah, and he also wrote letters to Ephraim and Manasseh inviting them to come to the house of the LORD in Jerusalem to keep the Passover of the LORD, the God of Israel.

Brown-Driver-Briggs

פֶּ֫סַח n.m. passover

1. sacrifice of passover, involving communion meal, hence a species of peace-offering

2. the animal victim of the passover

3. festival of the passover

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.