ἀνακλιθήσονται [3 verses](3rd pl fut ind pass) "Shall sit down," is anaklino, which means "to lean one thing upon another", "to cause to recline at a table", "to push", "to put back", "to open," and, in the passive, "to lie", "to sink", "to lean back", "to recline," and "to slope upwards (of ground)." -- The word translated as "sit down" means to "lean against" or "to be made to recline" by someone else, but here it is in the passive. In that form, it means "to recline" and "to sink" by oneself. Of course, at the time, people reclined to eat, but the sense of sinking below the patriarchs is part of its meaning.