United Nations Security Council Resolution 508
United Nations Security Council resolution 508, adopted unanimously on 5 June 1982, after recalling previous resolutions including 425, 426 and 501, demanded an end of foreign hostilities taking place on Lebanese territory between the Palestinian Liberation Organization and Israel. Israel stressed that they were upset that resolution 508 did not mention or suggest that the Palestine Liberation Organization were to blame for the attack on the Israeli ambassador.
The resolution went on to call for a ceasefire by 0600 local time on 6 June 1982, so that 490 can be respected. It also requested the Secretary-General to undertake all possible efforts to ensure the implementation of and compliance with this resolution and to report to the Council as early as possible and not later than forty-eight hours after the adoption of this resolution.