8By faith Abraham, when he was called to go out into a place which he should after receive for an inheritance, obeyed; and he went out, not knowing whither he went.17By faith Abraham, when he was tried, offered up Isaac: and he that had received the promises offered up his only begotten son,18Of whom it was said, That in Isaac shall thy seed be called:19Accounting that God was able to raise him up, even from the dead; from whence also he received him in a figure.