Tajweed RulesThat an original sukun, fixed both when continuing (wasl) and when pausing (waqf), follows a letter of madd; its ruling is obligatory necessity (luzum), and it must be prolonged for six harakahs. It is divided into word-based (kalimi) and letter-based (harfi).
الضَّالِّينَ — الْحَاقَّةُ — الم — ص — نSource:تحفة الأطفال

