Date Palm says Labbaik to Imam Hasan a.s. like a child hastens after his father

Ibne Jarir Tabari has narrated through his authorities from Muhammad bin Ishaq that he said: Hasan and Husain (a) were playing during childhood when Hasan called out to a date palm. The date palm harkened to his call and ran towards him like a child hastens after his father.

Dalailul Imamah, Pg. 63.