Then again, he is the Wahhabi King.

Via Bloomberg:

…Some Arab media outlets criticized Michelle Obama for wearing a blue dress, rather than a black one. Videos of the short meeting between Salman and President Obama showed the king leaving in the middle of the protocol, abruptly turning around and walking away, in order to go to prayer.

After the meeting, Barack Obama and Salman held a bilateral meeting that included Secretary of State John Kerry, Senator John McCain, National Security Adviser Susan Rice, Ambassador Joseph Westphal and CIA director John Brennan.