Sura Āl-ʿImrān 3:90

إِنَّ ٱلَّذِينَ كَفَرُوا۟ بَعْدَ إِيمَٰنِهِمْ ثُمَّ ٱزْدَادُوا۟ كُفْرًا لَّن تُقْبَلَ تَوْبَتُهُمْ وَأُو۟لَٰٓئِكَ هُمُ ٱلضَّآلُّونَ

inna lladhīna kafarū baʿda īmānihim thumma azdādū kufran lan tuqbala tawbatuhum wa-ūlāʾika humu l-ḍāllūna

But those who reject Faith after they accepted it, and then go on adding to their defiance of Faith,- never will their repentance be accepted; for they are those who have (of set purpose) gone astray.

Sura al-Tawbah 9:54

وَمَا مَنَعَهُمْ أَن تُقْبَلَ مِنْهُمْ نَفَقَٰتُهُمْ إِلَّآ أَنَّهُمْ كَفَرُوا۟ بِٱللَّـهِ وَبِرَسُولِهِۦ وَلَا يَأْتُونَ ٱلصَّلَوٰةَ إِلَّا وَهُمْ كُسَالَىٰ وَلَا يُنفِقُونَ إِلَّا وَهُمْ كَٰرِهُونَ

wa-mā manaʿahum an tuqbala minhum nafaqātuhum illā annahum kafarū billāhi wa-birasūlihi wa-lā yaʾtūna l-ṣalāta illā wa-hum kusāla wa-lā yunfiqūna illā wa-hum kārihūna

The only reasons why their contributions are not accepted are: that they reject Allah and His Messenger; that they come to prayer without earnestness; and that they offer contributions unwillingly.

Sura al-Dhāriyāt 51:29

فَأَقْبَلَتِ ٱمْرَأَتُهُۥ فِى صَرَّةٍ فَصَكَّتْ وَجْهَهَا وَقَالَتْ عَجُوزٌ عَقِيمٌ

fa-aqbalati imraʾatuhu fī ṣarratin fa-ṣakkat wajhahā wa-qālat ʿajūzun ʿaqīmun

But his wife came forward (laughing) aloud: she smote her forehead and said: "A barren old woman!"