1)
What caused Avimelech and Pichol to proclaim that Hashem was with Avraham in all his endeavors?
1.
Rashi: The fact that a. he emerged from the area of S'dom unscathed, b. the four kings fell into his hands and c. his wife bore him a son in his old age.
2.
Seforno and Rashbam: It was due to the miracles that Avraham had experienced that, out of the awe they felt towards him, they came to make a covenant with him, and not because they were afraid of his strength and his wealth.
