a. Ishmael had a Moabite wife. She refused hospitality to Abraham whom she did not recognise. He left word for Ishmael that he was to remove the “threshold!*' He therefore sent that wife away and took another who proved very hospitable and was commended by Abraham.
Why Abraham Told Ishmael to Change the Threshold
Gaster, Exempla no. 271; cf. Pirkei deRabbi Eliezer 30