NET

21 And the Lord smelled the soothing aroma and said to himself, “I will never again curse the ground because of humankind, even though the inclination of their minds is evil from childhood on. I will never again destroy everything that lives, as I have just done.

Darby

21 And Jehovah smelled the sweet odour. And Jehovah said in his heart, I will no more henceforth curse the ground on account of Man, for the thought of Man's heart is evil from his youth; and I will no more smite every living thing, as I have done.

KJV

21 And the LORD smelled a sweet savour; and the LORD said in his heart, I will not again curse the ground any more for man's sake; for the imagination of man's heart [is] evil from his youth; neither will I again smite any more every thing living, as I have done.