The Parable of the Word of Islam and the Word of Kufr
Allah says;
أَلَمْ تَرَ كَيْفَ ضَرَبَ اللّهُ مَثَلً كَلِمَةً طَيِّبَةً كَشَجَرةٍ طَيِّبَةٍ أَصْلُهَا ثَابِتٌ وَفَرْعُهَا فِي السَّمَاء
See you not how Allah sets forth a parable! A goodly word as a goodly tree, whose root is firmly fixed, and its branches (reach) to the sky.
Ali bin Abi Talhah reported that Abdullah bin Abbas commented that Allah's statement,
مَثَلً كَلِمَةً طَيِّبَةً
(a parable;a goodly word),
refers to testifying to La ilaha illallah, (none has the right to be worshipped but Allah)
while,
كَشَجَرةٍ طَيِّبَةٍ
(as a goodly tree),
refers to the believer,
and that,
أَصْلُهَا ثَابِتٌ
(whose root is firmly fixed),
indicates that La ilaha illallah, (none has the right to be worshipped but Allah) is firm in the believers' heart,
وَفَرْعُهَا فِي السَّمَاء
(and its branches (reach) to the sky.
with which the believer's works are ascended to heaven.
Similar is said by Ad-Dahhak, Sa'id bin Jubayr, Ikrimah, Mujahid and several others.
They stated that this parable describes the believer's deeds, good statements and good actions. The believer is just like the beneficial date tree, always having good actions ascending at all times, by day and by night.
Al-Bukhari recorded that Abdullah bin Umar said,
"We were with the Messenger of Allah when he asked,
أَخْبِرُونِي عَنْ شَجَرَةٍ تُشْبِهُ أَوْ كَالرَّجُلِ الْمُسْلِمِ لَا يَتَحَاتُّ وَرَقُهَا صَيْفًا وَلَا شِتَاءً وَتُوْتِي أُكُلَهَا كُلَّ حِينٍ بِإِذْنِ رَبِّهَا
Tell me about a tree that resembles the Muslim, the leaves of which do not fall in summer or winter and gives its fruit at all times by the leave of its Lord."
Ibn Umar said, "I thought of the date palm tree, but felt shy to answer when I saw that Abu Bakr and Umar did not talk.
When they did not give an answer, the Messenger of Allah said,
هِيَ النَّخْلَة
It is the date palm tree.
When we departed, I said to Umar, `My father, by Allah! I thought that it was the date tree.'
He said, `Why did you not speak then?'
I said, `I saw you were silent and I felt shy to say anything.'
Umar said, `Had you said it, it would have been more precious to me than such things (i.e., would have been very precious to me)."'
Abdullah bin Abbas said that,
كَشَجَرةٍ طَيِّبَةٍ
(as a goodly tree),
is a tree in Paradise.
Allah said next