1) The word (ف) connects the first sentence to the second as a response (ف + كن على يقين). 2) (كن) is the verb (كان) = (to be) conjugated with the imperative. كن على يقين= Be sure 4) اليقين= certainty 3) مهما = whatever/ even if.... whatever small, be sure....OR /Even if it is small, be sure ...!

whatever it was small be for sure/certain that its own grass would be enough . because , I had given you a very small sheep . but , I think it should be a little which means قليلاً in Arabic . because grammatically the sentence is wrong ! be = كن for certain = على يقين another example : be patient = كن صبوراً

كُنْ = Be