The Messenger of Allah ﷺ said, "Do not bring fear upon yourselves after you have known security."They asked, "What is that, Messenger of Allah?"He replied, "Debt."
حدثنا يحيى بن غيلان حدثنا رشدين حدثنا بكر بن عمرو المعافري حدثنا شعيب بن زرعة المعافري حدثه أنه سمع
إن رسول الله ﷺ يقول لا تخيفوا أنفسكم بعد أمنها قالوا وما ذاك يا رسول الله قال الدين
Its isnad is hasan because of Rushdin, and Bakr bin Amr Maafiri, whose hadith is trusted in the Sahihayn, and Shuayb bin Zurah, whom Ibn Hibban deemed trustworthy while Bukhari was silent about him. Haythami said in 4/126, Ahmad narrated it with two isnads, in one of which the narrators are trustworthy.