Surah 9. Al-Tawba, Ayah 102

I.e., neither believers in the full sense of the word nor hypocrites, but half-hearted, confused waverers between right and wrong, or between truth and falsehood.

Lit., "who have acknowledged their sins [after] having mingled a righteous deed with another that was evil". Although it relates primarily to the vacillating Muslims who refused to participate in the expedition to Tabuk, this verse alludes, in its wider meaning, to all sinners who - without external prompting - become conscious of their wrongdoing and repent of it.

 They have mixed their adherence to Islam with their disobedience to march forth with the Prophet (ﷺ) to Tabûk.

There were some whose will was weak and succumbed to evil, although there was much good in them. To them is held out the promise of forgiveness if they would repent and undertake all acts of Muslim charity, which would purify their souls, aided by the prayers of Allah's Messenger. Then would they get the Peace that comes from purity and right conduct.