"So they set off, until when they boarded the ship, he scuttled it." Moses said: "Have you scuttled it to drown its people? You have indeed done a grievous thing," meaning: a great matter of evil.
﴿فَانْطَلَقَا حَتَّى إِذَا رَكِبَا فِي السَّفِينَة خرقها قَالَ﴾ مُوسَى: ﴿أَخَرَقْتَهَا لِتُغْرِقَ أَهْلَهَا لَقَدْ جِئْت شَيْئا إمرا﴾ أَي: عَظِيما من الْمُنكر