Musalia Mudavadi did not use a bible during his swearing in as Prime cabinet secretary.This is because he is a strong member of Friends church.
Testimony to integrity and truth refers to the way many members of the Religious Society of Friends (Quakers) testify or bear witness to their belief that one should live a life that is true to God, true to oneself, and true to others. To Friends, the concept of integrity includes personal wholeness and consistency as well as honesty and fair dealings. From personal and inward integrity flow the outward signs of integrity, which include honesty and fairness. It is not only about telling the truth but also about applying ultimate truth to each situation. For example, Friends (Quakers) believe that integrity requires avoiding statements that are technically true but misleading.
That testimony has led to Friends having a reputation for being honest and fair in their dealings with others. It has led them to give proper credit to others for their contributions and to accept responsibility for their own actions. In those legal systems, if it is allowed, rather than swearing oaths in a court of law, Friends prefer to affirm. In England, that has been the case since 1695.