Explanation of the hadith
When the Prophet (may Allah's peace and blessings be upon him) came out of the place where he answered the call of nature, he would say: I ask You for (Your forgiveness), O Allah.
عَنْ عَائِشَةَ أُمِّ المؤْمنينَ رَضيَ اللهُ عنها:
عَنْ عَائِشَةَ أُمِّ المؤْمنينَ رَضيَ اللهُ عنها: أَنَّ النَّبِيَّ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ كَانَ إِذَا خَرَجَ مِنَ الغَائِطِ قَالَ: «غُفْرَانَكَ».
‘Ā’ishah, Mother of the Believers (may Allah be pleased with her), reported:
‘Ā’ishah, Mother of the Believers (may Allah be pleased with her), reported: When the Prophet (may Allah's peace and blessings be upon him) came out of the privy, he would say: 'Ghufrānak' (Your forgiveness).
When the Prophet (may Allah's peace and blessings be upon him) came out of the place where he answered the call of nature, he would say: I ask You for (Your forgiveness), O Allah.