Ibn Jurayj narrates from Amr bin Dinar (may Allah have mercy on him) that he said: I saw people paying compensation even for a mistake.
(b) Hasan al-Basri (may Allah have mercy on him) says: Judgement is passed against the muhrim both for a mistake and for a deliberate act.
(c) Ibrahim (may Allah have mercy on him) says: Judgement is passed against the muhrim even in the case of a mistake.
(d) Al-Hakam bin Utaybah (may Allah have mercy on him) says that Sayyiduna Umar (may Allah be pleased with him) used to pass judgement against the muhrim both for a mistake and for a deliberate act.
(e) Ata bin Abi Rabah (may Allah have mercy on him), concerning the saying of Allah Almighty: "Allah has pardoned what is past (in the Jahiliyyah)" [Surah al-Ma'idah: 95] and "And whoever returns, Allah will take retribution from him" [Surah al-Ma'idah: 95], says: Whoever returns (to it) in Islam, Allah will take retribution from him, and expiation is due from him for it.
(f) Al-Hasan, Sa'id bin Jubayr and Ibrahim al-Nakha'i (may Allah have mercy on them) say: Judgement is passed against him every time he kills (game).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9860