وَ قَالَ أَبِي رَضِيَ اللَّهُ عَنْهُ فِي رِسَالَتِهِ إِلَيَّ الْأَخْرَسُ إِذَا أَرَادَ أَنْ يُطَلِّقَ امْرَأَتَهُ أَلْقَى عَلَى رَأْسِهَا قِنَاعَهَا يُرِي أَنَّهَا قَدْ حَرُمَتْ عَلَيْهِ وَ إِذَا أَرَادَ مُرَاجَعَتَهَا كَشَفَ الْقِنَاعَ عَنْهَا يُرِي أَنَّهُ قَدْ حَلَّتْ لَهُ.
My father (may Allah سبحانه وتعالى be pleased with him) said in his letter to me: "If a mute man wants to divorce his wife, he places her veil on her head to show that she has become unlawful for him. If he wants to take her back, he removes the veil from her to show that she has become lawful for him."