Narrated Al-Mughira (Radi-Allahu 'anhu):The Prophet (Sallallahu 'Alaihi Wa Sallam) said, "Allah has forbidden you(1) to be undutiful to your mothers (2) to withhold (what you should give) or
(3) demand (what you do not deserve), and
(4) to bury your daughters alive.
And Allah has disliked that
(A) you talk too much about others
(B) ask too many questions (in religion), or
(C) waste your property."Bukhari Vol. 8 : No. 6
Narrated Abu Bakra (Radi-Allahu 'anhu):
Allah's Apostle (Sallallahu 'Alaihi Wa Sallam) said thrice, "Shall I not inform you of the biggest of the great sins?"
We said, "Yes, O Allah's Apostle." He said, "To join partners in worship with Allah: to be undutiful to one's parents."
The Prophet (Sallallahu 'Alaihi Wa Sallam) sat up after he had been reclining and added, "And I warn you against giving forged statement and a false witness; I warn you against giving a forged statement and a false witness." The Prophet (Sallallahu 'Alaihi Wa Sallam) kept on saying that warning till we thought that he would not stop.
Bukhari Vol. 8 : No. 7
Narrated Jubair bin Mut'im (Radi-Allahu 'anhu):
That he heard the Prophet (Sallallahu 'Alaihi Wa Sallam) saying, "The
person who severs the bond of kinship will not enter Paradise."
Bukhari Vol. 8 : No. 13