Je was op zoek naar: persisting (Engels - Swahili)

and they have been persisting in the heinous offence.
na walikuwa wakishikilia kufanya madhambi makubwa,

they said: "by god, you are still persisting in your old delusion."
wakasema: wallahi! hakika bado ungali katika upotovu wako wa zamani.

some of the desert dwelling arabs around you are hypocrites as are some of the inhabitants of medina. they are persisting in their hypocrisies.
na katika mabedui walio jirani zenu wamo wanaafiki; na katika wenyeji wa madina pia wapo walio bobea katika unaafiki.

and were persisting in great sin (joining partners in worship along with allah, committing murders and other crimes, etc.)
na walikuwa wakishikilia kufanya madhambi makubwa,

and those who, having done something to be ashamed of, or wronged their own souls, earnestly bring allah to mind, and ask for forgiveness for their sins,- and who can forgive sins except allah?- and are never obstinate in persisting knowingly in (the wrong) they have done.
na ambao pindi wafanyapo uchafu au wakajidhulumu nafsi zao humkumbuka mwenyezi mungu na wakamwomba msamaha kwa dhambi zao - na nani anaye futa dhambi isipo kuwa mwenyezi mungu? - na wala hawaendelei na waliyo yafanya na hali wanajua.