Genesis 15:5-6

Young's Literal Translation

⁵ and He bringeth him out without, and saith, `Look attentively, I pray thee, towards the heavens, and count the stars, if thou art able to count them;' and He saith to him, `Thus is thy seed.'

⁶ And he hath believed in Jehovah, and He reckoneth it to him -- righteousness.