Imam Sajjad (as) said “And the sins which are the cause of rejection of prayers are:
1) Bad intention
2) the wickedness of interior
3) hypocrisy with the (religious) brothers
4) disbelieving in the prayers being granted
5) delaying the obligatory services till their time is passed.
6) Abandoning the achievement of proximity of Allah through favors (to people) by alm giving
7) using obscene language and abusing during conversation.”[i]

[i] MAANI AL AKHBAR, P 271

Imam Sajjad (as) said “Guard against lies both small and big, in all conditions both in seriousness and joking.”[i]

[i] TUHFUL AQOOL, P 278

Imam Sajjad (as) said “If people knew what (brilliant result) lies in seeking knowledge they would have definitely sought it even by shedding the blood of their hearts and plunging into the depth of oceans.”[i]

[i] BIHAR UL ANWAR VOL I, P 185