I Chronicles 7:14 Midrash

בְּנֵ֣י מְנַשֶּׁ֔ה אַשְׂרִיאֵ֖ל אֲשֶׁ֣ר יָלָ֑דָה פִּֽילַגְשׁוֹ֙ הָֽאֲרַמִּיָּ֔ה יָלְדָ֕ה אֶת־מָכִ֖יר אֲבִ֥י גִלְעָֽד׃

The sons of Manasseh: Asriel, whom his wife bore—his concubine the Aramitess bore Machir the father of Gilead;

Read midrashic interpretation of I Chronicles 7:14: and classical rabbinic exegesis.