The number of people Jesus sends out here has a real, unresolved textual history - some of the earliest and best manuscripts of Luke read "seventy," others read "seventy-two," and this translation has chosen one side of that split. It's worth seeing why either number makes sense as an echo of the same older story. When Moses could no longer carry Israel's burden alone, God had him gather seventy elders at the Tent of Meeting so the same Spirit resting on Moses could rest on them too. But the story doesn't stop cleanly at seventy: two more men, Eldad and Medad, had been listed among the seventy but stayed behind in the camp - and the Spirit rested on them there anyway, so that they prophesied without ever going out to the Tent. Depending on how you count, that story already has both a "seventy" and a "seventy-two" hiding inside it. Whichever number Luke originally wrote, the deeper point survives either way: Jesus is doing again what God once did through Moses, extending his own authority and Spirit outward onto a wider circle of ordinary people carrying his mission forward.