RIYADH — Custodian of the Two Holy Mosques King Salman and Crown Prince Muhammad Bin Salman have sent separate cables of congratulations to Singaporean President Halimah Yacob on her country's National Day. In their cables, the King and the Crown Prince wished President Yacob constant good health and happiness and the government and people of Singapore steady progress and prosperity, a Saudi Press Agency (SPA) report said on Saturday.