Plene

In the Mishnah (according to the Kaufmann Codex), this vowel is nearly consistently written plene (about 10,000 occurrences); most exceptions are in the tractate Avot.

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Yet, Sir, think you, that your Omission, must so farre charme us to oblivion, as to make us forget, that as King Charles the first, did in plene Parliament, An. 1641. under his hand-writing, ratifie the Nationall Covenant, with the explication, and Bond thereto annexed, and prior Acts made anent it, with such solemnities and concurrent considerations, as it is impossible to question it;

Source: wiktionary

The Samaritan Pentateuch reflects the trend of the plene spellings in the post-Pentateuchal books rather than the defective spellings in the Torah in the Masoretic Text.

Source: wiktionary

Thus, in the Pentateuch and in the earlier prophets the plenes are counted, whilst in the later prophets the defectives are enumerated.

Source: wiktionary