Obama used family Bible at Monday 's swearing-in ; Will use four others on Sunday . ' Obama took the official oath on Sunday at the White House with his left hand on the family Bible of his wife , Michelle . So help me God ' not required part of presidential oath , but has been said . Legal challenge fell short before Sunday inauguration .
Obama used family Bible at Monday 's swearing-in ; Will use four others on Sunday . 'So help me God ' not required part of presidential oath , but has been said . Legal challenge fell short before Sunday inauguration .