Sura al-Tawbah 9:92

وَلَا عَلَى ٱلَّذِينَ إِذَا مَآ أَتَوْكَ لِتَحْمِلَهُمْ قُلْتَ لَآ أَجِدُ مَآ أَحْمِلُكُمْ عَلَيْهِ تَوَلَّوا۟ وَّأَعْيُنُهُمْ تَفِيضُ مِنَ ٱلدَّمْعِ حَزَنًا أَلَّا يَجِدُوا۟ مَا يُنفِقُونَ

wa-lā ʿalā lladhīna idhā mā atawka li-taḥmilahum qulta lā ajidu mā aḥmilukum ʿalayhi tawallaw wwa-aʿyunuhum tafīḍu mina l-damʿi ḥazanan allā yajidū mā yunfiqūna

Nor (is there blame) on those who came to thee to be provided with mounts, and when thou saidst, "I can find no mounts for you," they turned back, their eyes streaming with tears of grief that they had no resources wherewith to provide the expenses.