Quran 9:86~89 (Ayah at-Taubah)

Whenever a sûrah is revealed stating, “Believe in Allah and struggle along with His Messenger,” the rich among them would ask to be exempt, saying, “Leave us with those who remain behind.”They preferred to stay behind with the helpless, and their hearts have been sealed so they do not comprehend.But the Messenger and the believers with him strived with their wealth and their lives. They will have all the best, and it is they who will be successful.Allah has prepared for them Gardens under which rivers flow, to stay there forever. That is the ultimate triumph.Quran: 9:86~89Surah at-Taubah (Repentance)

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.

وَإِذَاۤ أُنزِلَتۡ سُورَةٌ
أَنۡ ءَامِنُوا۟ بِٱللَّهِ وَجَـٰهِدُوا۟ مَعَ رَسُولِهِ
ٱسۡتَءۡذَنَكَ أُو۟لُوا۟ ٱلطَّوۡلِ مِنۡهُمۡ
وَقَالُوا۟ ذَرۡنَا نَكُن مَّعَ ٱلۡقَـٰعِدِینَ

رَضُوا۟ بِأَن یَكُونُوا۟ مَعَ ٱلۡخَوَالِفِ وَطُبِعَ عَلَىٰ قُلُوبِهِمۡ فَهُمۡ لَا یَفۡقَهُونَ

لَـٰكِنِ ٱلرَّسُولُ وَٱلَّذِینَ ءَامَنُوا۟ مَعَهُۥ جَـٰهَدُوا۟ بِأَمۡوَ ٰلِهِمۡ وَأَنفُسِهِمۡۚ
وَأُو۟لَـٰۤىِٕكَ لَهُمُ ٱلۡخَیۡرَ ٰتُۖ
وَأُو۟لَـٰۤىِٕكَ هُمُ ٱلۡمُفۡلِحُونَ

أَعَدَّ ٱللَّهُ لَهُمۡ جَنَّـٰتࣲ تَجۡرِی مِن تَحۡتِهَا ٱلۡأَنۡهَـٰرُ خَـٰلِدِینَ فِیهَاۚ
ذَ ٰلِكَ ٱلۡفَوۡزُ ٱلۡعَظِیمُ

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.

جب کبھی کوئی سورۃ اس مضمون کی نازل ہوئی کہ اللہ کو مانو اور اس کے رسول کے ساتھ جہاد کرو تو تم نے دیکھا کہ جو لوگ ان میں سے صاحب مقدرت تھے وہی تم سے درخواست کرنے لگے کہ انہیں جہاد کی شرکت سے معاف رکھا جائے اور انہوں نے کہا کہ ہمیں چھوڑ دیجیے کہ ہم بیٹھنے والوں کے ساتھ رہیں ان لوگوں نے گھر بیٹھنے والیوں میں شامل ہونا پسند کیا اور ان کے دلوں پر ٹھپہ لگا دیا گیا، اس لیے ان کی سمجھ میں اب کچھ نہیں آتا
بخلاف اس کے رسولؐ نے اور ان لوگوں نے جو رسولؐ کے ساتھ ایمان لائے تھے
اپنی جان و مال سے جہاد کیا
اور اب ساری بھلائیاں انہی کے لیے ہیں اور وہی فلاح پانے والے ہیں
اللہ نے ان کے لیے ایسے باغ تیار رکھے ہیں جن کے نیچے نہریں بہ رہی ہیں،
ان میں وہ ہمیشہ رہیں گے
یہ ہے عظیم الشان کامیابی

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.
Sections:
Proclamation that the Treaty of Hudaibiyah is cancelled.
Honor the treaties with those who honor them. Fight with those who have broken the treaty.
Mushrikin are forbidden to be the caretakers of the Masjid al-Haram.
Muslims should trust Allah, not just their numbers.
Jews and Christians also committed Shirk. Command to spend in the path of Allah. The correct number of months.
The Tabuk expedition.
Those who stayed behind and did not participate in the Battle of Tabuk, hypocrites and weak in faith.
The proper distribution of charity. Those who speak ill of the Prophet or make fun of Allah and His Book.
The hypocrite men and women.