Palestinian President Mahmoud Abbas expressed his thanks and appreciation to the Custodian of the Two Holy Mosques, King Salman bin Abdul Aziz Al Saud, for assertion of Saudi steadfast stance on the Palestinian issue today at his opening speech of the 39th Gulf Summit. The Palestinian president stressed that the Kingdom of Saudi Arabia, under the leadership of the Custodian of the Two Holy Mosques, is the firm supporter of the Palestinian cause.