The Messenger of Allah ﷺ said, "Whoever eats a meal and then says, 'Praise be to Allah who has fed me this and provided it for me without any power or strength on my part,' Allah will forgive his past sins."
حدثنا أبو عبد الرحمن حدثنا سعيد قال حدثني أبو مرحوم
أن رسول الله ﷺ قال من أكل طعاما ثم قال الحمد لله الذي أطعمني هذا ورزقنيه من غير حول مني ولا قوة غفر الله له ما تقدم من ذنبه
Its chain is hasan, like the one before it. It is found in Abu Dawud 4/42, no. 4023, and Tirmidhi 5/508, no. 3458, in the chapter on supplications, what one says when finishing food, where he said, hasan gharib, and Ibn Majah 2/1093, no. 3285.