Tosefta for Genesis 26:16

וַיֹּ֥אמֶר אֲבִימֶ֖לֶךְ אֶל־יִצְחָ֑ק לֵ֚ךְ מֵֽעִמָּ֔נוּ כִּֽי־עָצַֽמְתָּ־מִמֶּ֖נּוּ מְאֹֽד׃

And Abimelech said unto Isaac: ‘Go from us; for thou art much mightier than we.’