Allah (swt) has paired here money with fear of Him (swt).

The verse talks about who spends his money out of his piety and doctrine which orders him to help the poor, to free a prisoner and to sympathize with the orphan, as Saydna Abo Baker Al-Siddeeq (May Allah be pleased with him) did when he spent his money to set free Saydna Bilal Ibn Rabah(May Allah be pleased with him), that is when he bought him from his master Omayyah Ibn Khalaf, who used to torture Saydna him badly, then Saydna Abo Baker freed him. This is one of the reasons for this verse revelation, as mentioned in previous interpretations.