Ὅμηρον ἐξ Ὁμήρου σαφηνίζειν → explain Homer from Homer, explain Homer with Homer
sumptĭ-făcĭo: fēci, 3, v. a. 2. sumptus,I to lay out, spend, expend: restim, Plaut. Cas. 2, 7, 2.