Sforno on Genesis 23:6/ספורנו על בראשית כ״ג:ו׳

1במבחר קברנו קבור, “do not wait until the formalities of the purchase have been completed, but go ahead and bury Sarah.” This corresponds to a statement by our sages in Moed Katan 22 על כל המתים כולן מדחה מטתו, “it behooves us to bury all the dead with dispatch, without undue delay.”