The Quran root ث ق ل th-q-l

إِنَّ اللَّهَ لَا يَظْلِمُ مِثْقَالَ ذَرَّةٍ وَإِن تَكُ حَسَنَةً يُضَاعِفْهَا وَيُؤْتِ مِن لَّدُنْهُ أَجْرًا عَظِيمًا ٤٠

مِثْقَالَ mith'qāla · (as much as) weight

Indeed, Allāh does not do injustice, [even] as much as an atom's weight; while if there is a good deed, He multiplies it and gives from Himself a great reward. (Surah An-Nisa, 4:40)

وَمَا تَكُونُ فِي شَأْنٍ وَمَا تَتْلُو مِنْهُ مِن قُرْآنٍ وَلَا تَعْمَلُونَ مِنْ عَمَلٍ إِلَّا كُنَّا عَلَيْكُمْ شُهُودًا إِذْ تُفِيضُونَ فِيهِ وَمَا يَعْزُبُ عَن رَّبِّكَ مِن مِّثْقَالِ ذَرَّةٍ فِي الْأَرْضِ وَلَا فِي السَّمَاءِ وَلَا أَصْغَرَ مِن ذَٰلِكَ وَلَا أَكْبَرَ إِلَّا فِي كِتَابٍ مُّبِينٍ ٦١

مِّثْقَالِ mith'qāli · (the) weight

And, [O Muḥammad], you are not [engaged] in any matter and do not recite any of the Qur’ān and you [people] do not do any deed except that We are witness over you when you are involved in it. And not absent from your Lord is any [part] of an atom's weight within the earth or within the heaven or [anything] smaller than that or greater but that it is in a clear register. (Surah Yunus, 10:61)

وَتَحْمِلُ أَثْقَالَكُمْ إِلَىٰ بَلَدٍ لَّمْ تَكُونُوا بَالِغِيهِ إِلَّا بِشِقِّ الْأَنفُسِ إِنَّ رَبَّكُمْ لَرَءُوفٌ رَّحِيمٌ ٧

أَثْقَالَكُمْ athqālakum · your loads

And they carry your loads to a land you could not have reached except with difficulty to yourselves. Indeed, your Lord is Kind and Merciful. (Surah An-Nahl, 16:7)

وَهُوَ الَّذِي يُرْسِلُ الرِّيَاحَ بُشْرًا بَيْنَ يَدَيْ رَحْمَتِهِ حَتَّىٰ إِذَا أَقَلَّتْ سَحَابًا ثِقَالًا سُقْنَاهُ لِبَلَدٍ مَّيِّتٍ فَأَنزَلْنَا بِهِ الْمَاءَ فَأَخْرَجْنَا بِهِ مِن كُلِّ الثَّمَرَاتِ كَذَٰلِكَ نُخْرِجُ الْمَوْتَىٰ لَعَلَّكُمْ تَذَكَّرُونَ ٥٧

ثِقَالًا thiqālan · heavy

And it is He who sends the winds as good tidings before His mercy [i.e., rainfall] until, when they have carried heavy rainclouds, We drive them to a dead land and We send down rain therein and bring forth thereby [some] of all the fruits. Thus will We bring forth the dead; perhaps you may be reminded. (Surah Al-A'raf, 7:57)

وَالْوَزْنُ يَوْمَئِذٍ الْحَقُّ فَمَن ثَقُلَتْ مَوَازِينُهُ فَأُولَٰئِكَ هُمُ الْمُفْلِحُونَ ٨

ثَقُلَتْ thaqulat · (will be) heavy

And the weighing [of deeds] that Day will be the truth. So those whose scales are heavy - it is they who will be the successful. (Surah Al-A'raf, 7:8)

أَمْ تَسْأَلُهُمْ أَجْرًا فَهُم مِّن مَّغْرَمٍ مُّثْقَلُونَ ٤٠

مُّثْقَلُونَ muth'qalūna · (are) overburdened

Or do you, [O Muḥammad], ask of them a payment, so they are by debt burdened down? (Surah At-Tur, 52:40)