"The people of Al-Kufah differed concerning this Verse: "And whoever kills a believer intentionally." So I went to Ibn 'Abbas and asked him, and he said: 'It was revealed among the last of what was revealed, and nothing of it was abrogated after that.'" (Using translation from Nasāʾī 4000)
لَقَدْ نَزَلَتْ فِي آخِرِ مَا أُنْزِلَ ثُمَّ مَا نَسَخَهَا شَيْءٌ