It is narrated from Sayyiduna Imam Hussain (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The beggar has a right, even if he is riding on a horse."
Hadith Referenceمسند احمد / مسند اهل البيت رضوان الله عليهم اجمعين / 1730
Hadith Gradingحکم دارالسلام:إسناده ضعيف، لجهالة يعلى بن أبي يحيي.