37:62
أَذَلِكَ خَيْر ٌ نُزُلاً أَمْ شَجَرَةُ الزَّقُّومِ
'Adhalika Khayrun Nuzulāan 'Am Shajaratu Az-Zaqqūmi 

Is that a better destination, or the tree of Bitterness?

44:43
إِنَّ شَجَرَةَ الزَّقُّومِ
'Inna Shajarata Az-Zaqqūmi 

Surely, the tree of Bitterness,

56:52
لَآكِلُونَ مِنْ شَجَر ٍ مِنْ زَقُّوم ٍ
La'ākilūna Min Shajarin Min Zaqqūmin 

Will eat from the tree of Bitterness,