Tajweed RulesThe vibration/bouncing of the letter when it is pronounced sakin (with sukun) so that a strong echoing sound is heard from it. Its letters are five, found in «قُطْبُ جَدٍّ» (qaf, ta, ba, jim, dal). It is minor (sughra) in the middle of a word, and major (kubra) when pausing.
يَجْعَلُونَ — الْفَلَقِ — أَحَدٌSource:تحفة الأطفال

