Once the Holy Prophet (s) was sitting with Amir al-mu’minin 'Ali (a) in the middle of a garden, which contained many trees, and was very fertile.
A bee came towards them and started circling above them for quite some time...
The Holy Prophet (s) addressing 'Ali ('a) said: Indeed this bee has made us his guests today. It said to me: I have placed for you some honey in that specific place. So send your brother Amir al-mu’minin to the place so that he may bring the same.
Thereupon Imam 'Ali ('a) stood up and brought the honey.
[Then] the Prophet (s) addressing the bee said:
O bee, surely your food is from the roses of flowers, and that is bitter [in taste]; so how does it change into sweet honey?
The bee replied: O Messenger of Allah, surely the sweetness of the honey comes from the blessing of mentioning your blessed name and the name [s] of your pure progeny; when we draw the nectar of the flowers we are inspired to invoke blessings upon you and your infallible progeny three times; therefore when we eat, the mention of salawat turns our honey sweet.
[Khazinat al-Jawahir was lama’aat al-Anwaar, p. 586]