Mishkat al-Masabih 21 Foods كتاب الأطعمة 26

وَعَن أنس قَالَ: رَأَيْتُ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مُقْعِيًا يَأْكُلُ تَمْرًا وَفِي رِوَايَةٍ: يَأْكُلُ مِنْهُ أكلا ذريعا. رَوَاهُ مُسلم

Anas told that he saw the Prophet squatting and eating dates. A version says he was eating some quickly. Muslim transmitted it.