Az-Zalzala 99:2 · Word 3
Root: ثقل — Appears 28 times in the Quran (26 verse).
Lemma: ثَّقَلَان — Appears 6 times in the Quran (4 verse).
In the verse
وَأَخْرَجَتِ ٱلْأَرْضُ أَثْقَالَهَا
et que la terre fera sortir ses fardeaux,
Other occurrences of this exact word
This word, in this exact form, doesn't appear anywhere else in the Quran.