Jerome of Stridon
In contrast to the names 'Abimelech' and 'Phicol,' the third name mentioned here does not appear in the Hebrew scripture.
At the same time Abimelech, and Phicol the general of his army, said to Abraham: God is with thee in all that thou dost.
וֽ͏ַיְהִי֙ בָּעֵ֣ת הַהִ֔וא וַיֹּ֣אמֶר אֲבִימֶ֗לֶךְ וּפִיכֹל֙ שַׂר־צְבָא֔וֹ אֶל־אַבְרָהָ֖ם לֵאמֹ֑ר אֱלֹהִ֣ים עִמְּךָ֔ בְּכֹ֥ל אֲשֶׁר־אַתָּ֖ה עֹשֶֽׂה׃
2 Church Fathers comment on this verse
In contrast to the names 'Abimelech' and 'Phicol,' the third name mentioned here does not appear in the Hebrew scripture.
God is present with you in every circumstance. Generally, these words indicate that Abimelech recognizes Abraham as being under the unique protection of Divine Providence. In light of the following events, it can be inferred that Abimelech seeks to form a bond with Abraham for a specific reason. This desire may be understood in relation to the clear evidence of God’s favor shown to Abraham through Isaac. Abimelech would have been aware of the miraculous way in which God had fulfilled His promises to grant Abraham an heir, and in response to Divine direction, he was eager to align himself with the chosen heir of the land of Canaan. Therefore, he sought to establish a lasting alliance (Gen. 21:23).
Passages read together with this verse.