إِنَّ اللَّهَ لَيُؤَيِّدُ هَذَا الدِّينَ بِالرَّجُلِ الْفَاجِرِ
Allah indeed supports this religion even by means of a sinful man.
Source: البخاري
يُؤَيِّدُ means “supports or strengthens,” while الْفَاجِرِ refers to a person who acts sinfully. The report shows that benefit to the religion can occur through someone whose personal conduct is flawed.
إِنَّ gives emphasis; اللَّهَ is its noun. The lām in لَيُؤَيِّدُ adds emphasis, and يُؤَيِّدُ is a present-tense verb. The preposition in بِالرَّجُلِ conveys the means through which support occurs.
Doing something that benefits others does not automatically prove that every part of the person’s conduct is sound. The benefit of an action and the character of its agent are distinct questions.