﴿ وَكَيْفَ تَأْخُذُونَهُۥ وَقَدْ أَفْضَىٰ بَعْضُكُمْ إِلَىٰ بَعْضٍۢ وَأَخَذْنَ مِنكُم مِّيثَٰقًا غَلِيظًۭا ﴾

“And how could you take it away after you have given yourselves to one another, and she has received a most solemn pledge from you?”

How shall you take it when each of you has been privily with the other and they have taken from you a solemn covenant. It means that the prior companionship has a firm inviolability so out of respect to its due stop and keep to what the covenant requires.