Abu Umamah reported: The Prophet, peace and blessings be upon him, would finish a meal and he would say, “All praise is due to Allah in abundance, purely and blessed, neither insufficient, nor abandoned, nor ignored from our Lord.”

Source: Sahih Bukhari 5142

Grade: Sahih (authentic) according to Al-Bukhari

http://dailyhadith.abuaminaelias.com/2013/07/22/hadith-on-meals-the-prophets-supplication-upon-finishing-his-food/