It was narrated from Ibn Abbas that the: Messenger of Allah ( صلی اللہ علیہ وسلم ) passed by a man in Makkah who was standing in the sun. He said: "What is this?" They said: "He vowed to fast and not to seek shade until night comes, and not to speak, and to remain standing." He said: "Let him speak and seek shade and let him sit down, but let him complete his fast."Another chain from Ibn 'Abbas, from the Prophet ( صلی اللہ علیہ وسلم ), with similar wording. expiation for breaking an oath."