[Machine] The Prophet Muhammad ﷺ said, "When you pray Fajr, say before speaking to anyone, 'O Allah, protect me from the Fire seven times, for if you die on that day, a portion of the Fire will be written for you.' And when you pray Maghrib, say before speaking to anyone something similar, for if you die during your night, a portion of the Fire will be written for you."  

قَالَ قَالَ رَسُولُ اللهِ ﷺ إِذَا صَلَّيْتَ الصُّبْحَ فَقُلْ قَبْلَ أَنْ تُكَلِّمَ أَحَدًا اللهُمَّ أَجِرْنِي مِنَ النَّارِ سَبْعَ مَرَّاتٍ فَإِنَّكَ إِنْ مُتَّ مِنْ يَوْمِكَ كُتِبَ لَكَ جِوَارٌ مِنَ النَّارِ وَإِذَا صَلَّيْتَ الْمَغْرِبَ فَقُلْ قَبْلَ أَنْ تُكَلِّمَ أَحَدًا مِثْلَ ذَلِكَ فَإِنَّكَ إِنْ مُتَّ مِنْ لَيْلَتِكَ كُتِبَ لَكَ جِوَارٌ مِنَ النَّارِ  

When you finish the sunset prayer, say: 'O Allah, protect me from Hell" seven times; for if you say that and die that night, protection from it would be recorded for you; and when you finish the dawn prayer, say it in a similar way, for if you die that day, protection from it would be recorded for you. AbuSa'id told me that al-Harith said: The Messenger of Allah ﷺ said this to us secretly, so we confine it to our brethren. (Using translation from Abū Dāʾūd 5079)   

"إذا انصرفْتَ من صلاة المغرب فقلْ: اللهمّ أَجرْنى من النّار سبعَ مرّاتٍ -فإنّك إذا قلتَ ذلك، ثم مُتّ في ليلتك كُتبَ لك جوارٌ منها- وإذا صليتَ الصبحَ فقلْ كذلك فإنك إنْ مُتَّ منْ يومكِ كتب لك جوارٌ منها".