Sura Hūd 11:120

وَكُلًّا نَّقُصُّ عَلَيْكَ مِنْ أَنۢبَآءِ ٱلرُّسُلِ مَا نُثَبِّتُ بِهِۦ فُؤَادَكَ وَجَآءَكَ فِى هَٰذِهِ ٱلْحَقُّ وَمَوْعِظَةٌ وَذِكْرَىٰ لِلْمُؤْمِنِينَ

wa-kullan nnaquṣṣu ʿalayka min anbāʾi l-rusuli mā nuthabbitu bihi fuʾādaka wa-jāʾaka fī hādhihi l-ḥaqqu wa-mawʿiẓatun wa-dhikrā lil-muʾminīna

All that we relate to thee of the stories of the messengers,- with it We make firm thy heart: in them there cometh to thee the Truth, as well as an exhortation and a message of remembrance to those who believe.

Sura al-Isrāʾ 17:74

وَلَوْلَآ أَن ثَبَّتْنَٰكَ لَقَدْ كِدتَّ تَرْكَنُ إِلَيْهِمْ شَيْـًٔا قَلِيلًا

wa-lawlā an thabbatnāka la-qad kidtta tarkanu ilayhim shayʾan qalīlan

And had We not given thee strength, thou wouldst nearly have inclined to them a little.

Sura al-Furqān 25:32

وَقَالَ ٱلَّذِينَ كَفَرُوا۟ لَوْلَا نُزِّلَ عَلَيْهِ ٱلْقُرْءَانُ جُمْلَةً وَٰحِدَةً كَذَٰلِكَ لِنُثَبِّتَ بِهِۦ فُؤَادَكَ وَرَتَّلْنَٰهُ تَرْتِيلًا

wa-qāla lladhīna kafarū lawlā nuzzila ʿalayhi l-qurʾānu jumlatan wāḥidatan ka-dhālika li-nuthabbita bihi fuʾādaka wa-rattalnāhu tartīlan

Those who reject Faith say: "Why is not the Qur'an revealed to him all at once? Thus (is it revealed), that We may strengthen thy heart thereby, and We have rehearsed it to thee in slow, well-arranged stages, gradually.