Abraham's prayer for Sodom answered

Reading through Genesis in the morning with the family and Abraham's amazing prayer in chapter 18, when he whittled the Lord down to allowing Sodom to escape destruction if it had just 10 righteous people within it. In chapter 19 we read of Lot's warnings to his sons-in-law being received with derision; then he, his wife and two daughters being dragged out of the city, and Lot himself pathetically appealing not to be made to go further than Zoar. One of the angels says (v22), 'I cannot do anything till thou be come thither', this showed that Sodom could not be destroyed while there was just one 'righteous' man there and no matter how tardy or foolish he may be, the Lord purposed to save him, and, by His mighty grace, he will save you to - unless you are determined to perish!