I’ve posted my translation of Genesis 15:3 in the Verse Translations Forum (in the event you may want to post a question or make a comment). On the other hand, you can also download the translation in PDF form.
By way of context, this verse and the preceding one constitute Abram’s response to God’s promise of offspring. Abram is not amused. The only other commercial translation that comes close to getting this right is the LXE (the English translation of the Greek Old Testament).