Abraham's faith in God to provide was what he had shared with Isaac before hand, and this faith in God to provide was seen when God provided the ram to replace Isaac as the sacrifice.
Genesis 22:7 And Isaac spake unto Abraham his father, and said, My father: and he said, Here am I, my son. And he said, Behold the fire and the wood: but where is the lamb for a burnt offering? 8 And Abraham said
, My son, God will provide himself a lamb for a burnt offering: so they went both of them together.
13 And Abraham lifted up his eyes, and looked, and behold behind him a ram caught in a thicket by his horns: and Abraham went and took the ram, and offered him up for a burnt offering in the stead of his son. 14
And Abraham called the name of that place Jehovahjireh: as it is said to this day, In the mount of the Lord it shall be seen.
Anraham named that place per his faith in God to provide. All Jews knows this for why James, a former Jew, was referring to that moment about Abraham's faith in God to provide. May God cause the increase.