Secretary of State Antony J. Blinken said Hamas leaders could save Palestinian lives by accepting a proposed deal under which they would free 33 hostages in exchange for a six-week cease-fire and the liberation of many Palestinian prisoners. He said at the start of a meeting in Tel Aviv and Jerusalem that the time is now long past due to bring the hostages home to their families. Israel agreed to lower the required number of hostages released in the initial round to 33 from 40.