Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) says regarding this verse: It is about the man who marries without fixing a dowry, then divorces her before consummation. Allah Almighty has commanded that he give her provision (mut'ah) according to his ease or hardship: if he is wealthy, he should give her a servant or something equivalent; and if he is in hardship, then three garments or something equivalent.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصداق / 14405