O’ Believers, do not ask [useless & unnecessary] questions about matters, which, if explained in detail, would cause hardship upon you (such as whether or not one should go to the Pilgrimage of Mecca only once or once a year.) If you ask them when Qur’an is being revealed [or perhaps when it is being penetrated in your heart,] the answers will be made known to you. God has forgiven you for what you have done up to this point as He is Forgiving and Understanding.