The people of Kûfa complained against Sa'd to 'Umar and the latter dismissed him and appointed ' Ammâr as their chief. They lodged many complaints against Sa'd and even they alleged that he did not offer the (prayer) properly. 'Umar sent for him and said, O Aba ! These people claim that you do not offer the (prayer) properly." Ishâq said, "By Allâh, I used to pray with them a (prayer) similar to that of Allâh's Messenger (ﷺ) and I never reduced anything of it. I used to prolong the first two Rak'at of 'Isha' prayer and shorten the last two Rak'at." 'Umar said, "O Aba Ishâq, this was what I thought about you." And then he sent one or more persons with him to Kûfa so as to ask the people about him. So they went there and did not leave any mosque without asking about him. All the people praised him till they came to the mosque of the tribe of Banî ' Abs; one of the men called Usâma bin Qatâda with surname of Aba Sa'da stood up and said, "As you have put us under an oath; I am bound to tell you that Sa'd never went himself with the army and never distributed (the war booty) equally and never did justice in legal verdicts." (On hearing it) Sa'd said, "I invoke Allâh for three things: O Allah ! If this slave of yours is a liar and got up for showing off, give him a long life, increase his poverty and put him to trials." (And so it happened). Later on when that person was asked how he was, he used to reply that he was an old man in trial as a result of Sa'd's curse. Narrated Jâbir, that he had seen him afterwards and his eyebrows were overhanging his eyes owing to old age and he used to tease and assault the small girls on the roads. [1:722-0.B.]