Sincerity in Faith (Ikhlas)

وَلَا تَكُونُوا۟ كَٱلَّذِينَ قَالُوا۟ سَمِعْنَا وَهُمْ لَا يَسْمَعُونَ

And do not be like those who say, "We have heard," while they do not hear.

أَمْ حَسِبْتُمْ أَن تُتْرَكُوا۟ وَلَمَّا يَعْلَمِ ٱللَّهُ ٱلَّذِينَ جَـٰهَدُوا۟ مِنكُمْ وَلَمْ يَتَّخِذُوا۟ مِن دُونِ ٱللَّهِ وَلَا رَسُولِهِۦ وَلَا ٱلْمُؤْمِنِينَ وَلِيجَةً ۚ وَٱللَّهُ خَبِيرٌۢ بِمَا تَعْمَلُونَ

Do you think that you will be left [as you are] while Allāh has not yet made evident those among you who strive [for His cause] and do not take other than Allāh, His Messenger and the believers as intimates? And Allāh is [fully] Aware of what you do.

يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ لِمَ تَقُولُونَ مَا لَا تَفْعَلُونَ

O you who have believed, why do you say what you do not do?