Mishkat al-Masabih 1 Faith كتاب الإيمان 12

وَعَن أنس أَنَّهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ صَلَّى صَلَاتَنَا وَاسْتَقْبَلَ قِبْلَتَنَا وَأَكَلَ ذَبِيحَتَنَا فَذَلِكَ الْمُسْلِمُ الَّذِي لَهُ ذِمَّةُ اللَّهِ وَذِمَّةُ رَسُولِهِ فَلَا تُخْفِرُوا اللَّهَ فِي ذمَّته» . رَوَاهُ البُخَارِيّ

Anas reported God’s messenger as saying, “If anyone observes our form of prayer, faces our qibla , and eats what we kill, that one is a Muslim who has protection from God and His messenger; so do not betray God’s protection.” Bukhari transmitted it.