There are some who have confessed their sins: they have mixed records of good and bad deeds. It is quite possible that Allah may turn to them in mercy, for Allah is Forgiving, MercifulQuran 9:102
The name of the surah, at-Taubah is derived from ت و ب and it occurs 87 times in the Quran. Interestingly, this surah has the highest usage of the words derived from ت و ب compared to all other surahs – it is used 17 times.
In Ayat 118, occurs the case of the three companions whom Allah turned to and accepted their tawbah to Him – those who had abstained from joining the Jihad at the Battle of Tabuk.
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ٱعۡتَرَفُوا۟ بِذُنُوبِهِمۡ خَلَطُوا۟ 
عَمَلࣰا صَـٰلِحࣰا وَءَاخَرَ سَیِّئًا 
عَسَى ٱللَّهُ 
أَن یَتُوبَ عَلَیۡهِمۡۚ 
إِنَّ ٱللَّهَ 
غَفُورࣱ رَّحِیمٌ
This is the only Sūrah of the Qur’ān to which ‘In the Name of God, Most Gracious Most Merciful’ is not prefixed. Though the commentators have given different reasons for this, the correct one that which has been given by Imām Razi: namely this is because the Prophet himself did not dictate it at the beginning of the Sūrah. Therefore the Companions did not prefix it and their successors followed them. This is a further proof of the fact that utmost care has been taken to keep the Qur’ān intact so that it should remain in its complete and original form.
کچھ اور لوگ ہیں جنہوں نے اپنے قصوروں کا اعتراف کر لیا ہے
ان کا عمل مخلوط ہے، کچھ نیک ہے اور کچھ بد، 

بعید نہیں کہ اللہ ان پر پھر مہربان ہو جائے کیونکہ 
وہ درگزر کرنے والا 
اور رحم فرمانے والا ہے
The basic subjects of the Surah are: The non-believers who broke their treaties, Muslims have no obligation to honor treaties with them. Muslims must protect themselves from hypocrisy, weak faith and negligence. Battle of Tabuk and its lessons.