Surah Al-Baqarah, Verse 189

۞ يَسۡـَٔلُونَكَ عَنِ ٱلۡأَهِلَّةِۖ قُلۡ هِيَ مَوَٰقِيتُ لِلنَّاسِ وَٱلۡحَجِّۗ وَلَيۡسَ ٱلۡبِرُّ بِأَن تَأۡتُواْ ٱلۡبُيُوتَ مِن ظُهُورِهَا وَلَٰكِنَّ ٱلۡبِرَّ مَنِ ٱتَّقَىٰۗ وَأۡتُواْ ٱلۡبُيُوتَ مِنۡ أَبۡوَٰبِهَاۚ وَٱتَّقُواْ ٱللَّهَ لَعَلَّكُمۡ تُفۡلِحُونَ١٨٩

yasalūnaka ʿani l-ahilati qul hiya mawāqītu lilnnāsi wal-ḥaji walaysa l-biru bi-an tatū l-buyūta min ẓuhūrihā walākinna l-bira mani ittaqā watū l-buyūta min abwābihā wa-ittaqū l-laha laʿallakum tuf'liḥūna

They ask you, [O Muḥammad], about the crescent moons. Say, "They are measurements of time for the people and for ḥajj [pilgrimage]." And it is not righteousness to enter houses from the back, but righteousness is [in] one who fears Allāh. And enter houses from their doors. And fear Allāh that you may succeed.