1 Kings 2:30

Come forth Benaiah would prefer, if it may be, to execute the sentence upon Joab elsewhere than within the precincts of the tabernacle.

I will die here Joab is conscious of Benaiah's errand, but perhaps hopes still to escape death if he remain at the altar.

brought the king word again It seems from this that Solomon had thought it would be possible to bring Joab away from the altar. When this could not be done Benaiah feels that he may return for further orders.