Al Rajhi Bankk is losing ground to peers in Saudi Arabia, its home market, as slowing credit growth and intensifying competition for retail customers weigh on earnings. The world’s biggest Islamic bank said this week that first-quarter profit fell 17% from a year earlier, its third quarter of declining earnings. Lending growth in the three months slowed to 7% from 19% in the same period of 2013. That compares with 30% for Bank Albilad and 11% for Samba Financial Group. Profit at the Riyadh-based bank is slowing even as the Saudi economy is poised to grow 4.2% this year, because rival banks are increasingly turning their attention to retail customers as new labour laws stifle construction projects. Construction lending accounted for 7.7% of total bank loans in 2013.