This is the first of their characteristics. There are two types of hypocrisy: Hypocrisy in belief and hypocrisy in conduct or behavioural hypocrisy.
Hypocrisy in belief is when a person conceals his disbelief and acts as a believer in front of others.
Whereas hypocrisy in conduct is presented as the two-faced person. And the two-faced person will not be a person of distinction with Allah U.
Allah U says:
﴾إِنَّ الْمُنَافِقِينَ فِي الدَّرْكِ الأَسْفَلِ مِنْ النَّارِ وَلَنْ تَجِدَ لَهُمْ نَصِيراً﴿
“Indeed, the hypocrites will be in the lowest depths of the Fire – and never will you find for them a helper” [Surah An-Nisaa’: 145].
The Prophet r said:
((أَرْبَعٌ مَنْ كُنَّ فِيهِ كَانَ مُنَافِقًا خَالِصًا، وَمَنْ كَانَتْ فِيهِ خَصْلَةٌ مِنْهُنَّ كَانَتْ فِيهِ خَصْلَةٌ مِنَ النِّفَاقِ حَتَّى يَدَعَهَا: إِذَا اؤْتُمِنَ خَانَ، وَإِذَا حَدَّثَ كَذَبَ، وَإِذَا عَاهَدَ غَدَرَ، وَإِذَا خَاصَمَ فَجَرَ))
“Whoever has the following four (characteristics) will be a pure hypocrite and whoever has one of the following four characteristics will have one characteristic of hypocrisy unless and until he gives it up. Whenever he is entrusted, he betrays. Whenever he speaks, he tells a lie. Whenever he makes a covenant, he proves treacherous. Whenever he quarrels, he behaves in a very imprudent, evil and insulting manner.”