Genesis 2:18

'לא טוב היות וגו IT IS NOT GOOD etc. — I shall make an help meet for him in order that people may not say that there are two Deities, the Holy One, blessed be He, the only One among the celestial Beings without a mate, and this one (Adam), the only one among the terrestrial beings, without a mate (Pirkei D'Rabbi Eliezer 12). עזר כנגדו A HELP MEET FOR HIM — (כנגדו literally, opposite, opposed to him) If he is worthy she shall be a help to him; if he is unworthy she shall be opposed to him, to fight him (Yevamot 63a).

וַיֹּ֙אמֶר֙ יְהֹוָ֣ה אֱלֹהִ֔ים לֹא־ט֛וֹב הֱי֥וֹת הָֽאָדָ֖ם לְבַדּ֑וֹ אֶֽעֱשֶׂה־לּ֥וֹ עֵ֖זֶר כְּנֶגְדּֽוֹ׃

And the Lord God said, It is not good that the man should be alone; I will make him a help to match him.