Allah spoke to Moosa AS, at the time he was asking aid in prayer, “O Moosa! Desire protection of Me with a mouth that thou hast not sinned withal.” Moosa AS answered, “I possess not such a mouth.” Allah said, “Call upon Me with another mouth! Act so that all thy mouths by night and by day may be raising prayers. When thou hast sinned with one mouth, with thy other mouth cry, ‘O Allah!’ Or else cleanse thy own mouth, and make thy spirit alert and quick. [MATHNAWI]