Quran 9:92 from Surah At-Tawba on Divine Marvels.
وَلَا عَلَى ٱلَّذِينَ إِذَا مَآ أَتَوۡكَ لِتَحۡمِلَهُمۡ قُلۡتَ لَآ أَجِدُ مَآ أَحۡمِلُكُمۡ عَلَيۡهِ تَوَلَّواْ وَّأَعۡيُنُهُمۡ تَفِيضُ مِنَ ٱلدَّمۡعِ حَزَنًا أَلَّا يَجِدُواْ مَا يُنفِقُونَ
English translation: And not on those who when when they came to you that you provide them with mounts you said Not I find what to mount you on [it] They turned back with their eyes flowing [of] (with) the tears (of) sorrow that not they find what they (could) spend
Transliteration: wala ala alladhina idha ma atawka litahmilahum qul'ta la ajidu ma ahmilukum alayhi tawallaw wa-a'yunuhum tafidu mina al-dam'i hazanan alla yajidu ma yunfiquna