7. Sarah having conceived, according to the divine promise, Abraham left the plain of Mamre, and went south to Gerar, where Abimelech reigned; and again fearing lest Sarah should be forced from him, and himself be put to death, her beauty having been, it would appear, preternaturally continued, notwithstanding her age, he here called her, as he had done in Egypt, his sister. Abimelech took her to his house, designing to marry her; but God having, in a dream, informed him that she was Abraham’s wife, he returned her to him with great presents. This year Sarah was delivered of Isaac; and Abraham circumcised him, according to the covenant stipulation; and when he was weaned, made a great entertainment. Sarah, having observed Ishmael, son of Hagar, mocking her son Isaac, said to Abraham, “Cast out this bondwoman and her son, for Ishmael shall not be heir with Isaac.” After great reluctance, Abraham complied; God having informed him that this was according to the appointments of his providence, with respect to future ages. About the same time, Abimelech came with Phicol, his general, to conclude an alliance with Abraham, who made that prince a present of seven ewe lambs out of his flock, in confirmation that a well he had opened should be his own property; and they called the place Beer-sheba, or “the well of swearing,” because of the covenant there ratified with oaths. Here Abraham planted a grove, built an altar, and for some time resided, Gen. xx, xxi. 8. More than twenty years after this, (A. M. 2133,) God, for the final trial and illustration of Abraham’s faith, directed him to offer up his son Isaac. Abraham took his son, and two servants, and went toward mount Moriah. When within sight of the mountain, Abraham left his servants, and ascended it with his son only; and there having bound him, he prepared for the affecting sacrifice; but when he was about to give the blow, an angel from heaven cried out to him, “Lay not thine hand upon the lad, neither do thou any thing to him. Now I know that thou fearest God, since thou hast not withheld thine only son from me.” Abraham, turning, saw a ram entangled in the bush by his horns; and he offered this animal as a burnt offering, instead of his son Isaac. This memorable place he called by the prophetic name, _Jehovah-jireh_, or _the Lord will see_--or _provide_, Gen. xxii, 1–14, having respect, no doubt, to the true sacrifice which, in the fulness of time, was to be offered for the whole world upon the same mountain.