Allah does not persecute you for your purposeless (and frivolous) oaths, but takes you to task for your (solemn) oaths which you affirm (deliberately). (If you breach such oaths) the atonement is feeding ten poor persons with an average (quality) food which you serve to your family, or providing them (i.e. the poor) with the clothes, or freeing one neck (a slave or slave girl). But the one who does not find (all this) shall fast for three days. This is the atonement for your oaths which you affirm (and then break). So, always guard your oaths. It is this way Allah explains most clearly His Revelations to you so that you may become grateful (by obeying His Commandments).