Yusuf Ali
Never should a believer kill a believer; but (If it so happens) by mistake, (Compensation is due): If one (so) kills a believer, it is ordained that he should free a believing slave, and pay compensation to the deceased´s family, unless they remit it freely. If the deceased belonged to a people at war with you, and he was a believer, the freeing of a believing slave (Is enough). If he belonged to a people with whom ye have treaty of Mutual alliance, compensation should be paid to his family, and a believing slave be freed. For those who find this beyond their means, (is prescribed) a fast for two months running: by way of repentance to Allah: for Allah hath all knowledge and all wisdom.

Sahih International
And never is it for a believer to kill a believer except by mistake. And whoever kills a believer by mistake - then the freeing of a believing slave and a compensation payment presented to the deceased's family [is required] unless they give [up their right as] charity. But if the deceased was from a people at war with you and he was a believer - then [only] the freeing of a believing slave; and if he was from a people with whom you have a treaty - then a compensation payment presented to his family and the freeing of a believing slave. And whoever does not find [one or cannot afford to buy one] - then [instead], a fast for two months consecutively, [seeking] acceptance of repentance from Allah. And Allah is ever Knowing and Wise.

Shakir
And it does not behoove a believer to kill a believer except by mistake, and whoever kills a believer by mistake, he should free a believing slave, and blood-money should be paid to his people unless they remit it as alms; but if he be from a tribe hostile to you and he is a believer, the freeing of a believing slave (suffices), and if he is from a tribe between whom and you there is a convenant, the blood-money should be paid to his people along with the freeing of a believing slave; but he who cannot find (a slave) should fast for two months successively: a penance from Allah, and Allah is Knowing, Wise.

Pickthall
It is not for a believer to kill a believer unless (it be) by mistake. He who hath killed a believer by mistake must set free a believing slave, and pay the blood-money to the family of the slain, unless they remit it as a charity. If he (the victim) be of a people hostile unto you, and he is a believer, then (the penance is) to set free a believing slave. And if he cometh of a folk between whom and you there is a covenant, then the blood-money must be paid unto his folk and (also) a believing slave must be set free. And whoso hath not the wherewithal must fast two consecutive months. A penance from Allah. Allah is Knower, Wise.

محمد جالندھری
اور کسی مومن کو شایان نہیں کہ مومن کو مار ڈالے مگر بھول کر اور جو بھول کر بھی مومن کو مار ڈالے تو (ایک تو) ایک مسلمان غلام آزاد کردے اور (دوسرے) مقتول کے وارثوں کو خون بہا دے ہاں اگر وہ معاف کردیں (تو ان کو اختیار ہے) اگر مقتول تمہارے دشمنوں کی جماعت میں سے ہو اور وہ خود مومن ہو تو صرف ایک مسلمان غلام آزاد کرنا چاہیئے اور اگر مقتول ایسے لوگوں میں سے ہو جن میں اور تم میں صلح کا عہد ہو تو وارثان مقتول کو خون بہا دینا اور ایک مسلمان غلام آزاد کرنا چاہیئے اور جس کو یہ میسر نہ ہو وہ متواتر دو مہینے کے روزے رکھے یہ (کفارہ) خدا کی طرف سے (قبول) توبہ (کے لئے) ہے اور خدا (سب کچھ) جانتا اور بڑی حکمت والا ہے