1 Kings 2:7

Quest. Why doth he not require the like kindness to Mephibosheth the son of his dear Jonathan? Answ. Either he and his were now extinct, or by their after-miscarriages had forfeited his favour. For so, i.e. with such kindness either as I cannot express, (as the particle so is elsewhere used,) or as I command thee to show to them. They, i.e. Barzillai and his sons; for though Barzillai only be mentioned, 2 Samuel 17:27, yet his sons doubtless were instrumental in the business, especially Chimham, 2 Samuel 19:37,38.