The reward of glorification!
One day Imam Ahmad ibn Hanbal was travelling to Ash-Shaam and on the way, he stopped by a Masjid to spend the night. The guard of the Masjid told him he needs to leave the masjid as it's about to close. Though Imam Ahmad said he had no other place to go the guard insisted that he leaves. Imagine, the Imam of his time, Imam Ahmad, if he wanted to he could have mentioned who he was and got whatever he wanted but he رحمه الله didn't, and instead he left with his belongings and w