Al Hadub/Al Hadab
It means the edges or threads that come from the garment. In botanical science, these small needle leaves are a specific type of leaves for some plants such as tamarins, conifers, and cypress trees.
Salim ibn Jabir al-Hujaymi said: “I came up to the Prophet, may Allah bless him and grant him peace, when he was wrapped up in a cloak whose edges were cover his feet. I said: O Messenger of God, advise me. He said: ‘You must have fearful awareness of Allah. Do not scorn anything correct, even pouring water from your bucket into the bucket of someone else who asks you for water or talking to your brother with a happy face. Beware of dragging your waist-wrapper – it is part of arrogance and Allah does not like it. If a man blames you for something he knows about you, do not blame him for anything you know of him. Leave him to his own evil. You will have your reward. Do not abuse anything.” He said: After the words of the Prophet, may God bless him and grant him peace, I did not abuse an animal or a human. (Al-Bukhari, The Book of Al-Adab Al-Mufrad)