• أَخْبَتُوٓا۟
• تُخْبِتَ
• مُخْبِتِين

Appears 3 times in the Quran.

1. 11:23 إِنَّ ٱلَّذِينَ ءَامَنُوا۟ وَعَمِلُوا۟ ٱلصَّٰلِحَٰتِ وَأَخْبَتُوٓا۟ إِلَىٰ رَبِّهِمْ أُو۟لَٰٓئِكَ أَصْحَٰبُ ٱلْجَنَّةِ هُمْ فِيهَا خَٰلِدُونَ

   Surely (as to) those who believe and do good and humble themselves to their Lord, these are the dwellers of the garden, in it they will abide.
   

2. 22:34 وَلِكُلِّ أُمَّةٍ جَعَلْنَا مَنسَكًا لِّيَذْكُرُوا۟ ٱسْمَ ٱللَّهِ عَلَىٰ مَا رَزَقَهُم مِّنۢ بَهِيمَةِ ٱلْأَنْعَٰمِ فَإِلَٰهُكُمْ إِلَٰهٌ وَٰحِدٌ فَلَهُۥٓ أَسْلِمُوا۟ وَبَشِّرِ ٱلْمُخْبِتِينَ

   And to every nation We appointed acts of devotion that they may mention the name of Allah on what He has given them of the cattle quadrupeds; so your god is One God, therefore to Him should you submit, and give good news to the humble,
   

3. 22:54 وَلِيَعْلَمَ ٱلَّذِينَ أُوتُوا۟ ٱلْعِلْمَ أَنَّهُ ٱلْحَقُّ مِن رَّبِّكَ فَيُؤْمِنُوا۟ بِهِۦ فَتُخْبِتَ لَهُۥ قُلُوبُهُمْ وَإِنَّ ٱللَّهَ لَهَادِ ٱلَّذِينَ ءَامَنُوٓا۟ إِلَىٰ صِرَٰطٍ مُّسْتَقِيمٍ

   And that those who have been given the knowledge may know that it is the truth from your Lord, so they may believe in it and their hearts may be lowly before it; and most surely Allah is the Guide of those who believe into a right path.