﴿ يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ كُتِبَ عَلَيْكُمُ ٱلصِّيَامُ كَمَا كُتِبَ عَلَى ٱلَّذِينَ مِن قَبْلِكُمْ لَعَلَّكُمْ تَتَّقُونَ ﴾

“O YOU who have attained to faith! Fasting is ordained for you as it was ordained for those before you, so that you might remain conscious of God:”

Please check ayah 2:184 for complete tafsir.