Hadiths 1.32, 1.33 and 1.34

1.32:
Narrated Abu Huraira: The Prophet said, "The signs of a
hypocrite are three: −1. Whenever he speaks, he tells a lie.
−2. Whenever he promises, he always breaks it (his promise ).
−3. If you trust him, he proves to be dishonest. (If you keep
something as a trust with him, he will not return it.)"

1.33:
Narrated `Abdullah bin `Amr: The Prophet said, "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. −1. Whenever he is entrusted, he betrays. −2. Whenever
he speaks, he tells a lie. −3. Whenever he makes a covenant,
he proves treacherous. −4. Whenever he quarrels, he behaves in
a very imprudent, evil and insulting manner."

1.34:
Narrated Abu Huraira: Allah's Apostle said, "Whoever
establishes the prayers on the night of Qadr out of sincere
faith and hoping to attain Allah's rewards (not to show off)
then all his past sins will be forgiven."