Al-Humaydi reported: Sufyan al-Thawri, may Allah have mercy on him, said, “The believer is in need of patience just as he is in need of food and drink.”
Source: al-Ṣabr li-Ibn Abī Dunyā 84
عَنِ الْحُمَيْدِيِّ عَنْ سُفْيَانَ الثَّوْرِيَّ رحمه الله قَالَ يَحْتَاجُ الْمُؤْمِنُ إِلَى الصَّبْرِ كَمَا يَحْتَاجُ إِلَى الطَّعَامِ وَالشَّرَابِ
84 الصبر لابن أبي الدنيا