Haste

Mistakes happen frequently [when work is done] with haste.

العَجَلُ يوجِبُ العِثارَ . ح: 432

Haste causes stumbling. H: 432

التُّؤَدَةُ مَمدوحَةٌ في كُلِّ شَي‏ءٍ إلّا في فُرَصِ الخَيرِ . ح: 1937

Deliberateness is recommended in everything except when embarking on opportunities for good-doing. H: 1937

مَعَ العَجَلِ يَكثُرُ الزَّلَلُ . ح: 9740

Mistakes happen frequently [when work is done] with haste. H: 974