salah involves surat al fatihah followed by either quls or in many cases baqarah
here is what baqarah says about non-muslims
“For disbelievers is a painful doom.” 2:104 Allah will make disbelievers’ lives miserable in this world and torture them forever after they die. 2:114 They will not emerge from the Fire. 2:167 Disbelievers worship false gods. The will burn forever in the Fire. 2:257 Apostates will be cursed by Allah, angels, and men. They will have a painful doom. 3:86-88