[Al-Bukhari Book 08, Chapter 76, Hadith # 509].

English Translation of Hadith
Hazrat Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah [SAWW](PBUH) said, "Allah, the Exalted, has said: `I will declare war against him who treats with hostility a pious worshipper of Mine. And the most beloved thing with which My slave comes nearer to Me, is what I have enjoined upon him; and My slave keeps on coming closer to Me through performing Nawafil (voluntary prayers or doing extra deeds besides what is obligatory) until I love him, (so much so that) I become his hearing with which he hears, and his sight with which he sees, and his hand with which he strikes, and his leg with which he walks; and if he asks Me something, I will surely give him, and if he seeks My Protection (refuge), I will surely protect him".
[Al-Bukhari Book 08, Chapter 76, Hadith # 509].
Lesson : as mentioned above in Surah Al-Furqan Ayat 31."But Sufficient is your Lord as a Guide and Helper" This Hadith tell us the status and distinctive signs of the favoured men of Allah (‘Auliya’ Allah) The Noble Qur’an has defined them as: "Those who believed (in the Oneness of Allah) and used to fear Allah much (by abstaining from evil deeds and sins and by doing righteous deeds)". (10:63). According to this definition, every believer who really fears Allah is a favoured of Allah. It means that except for Faith and piety, favoured of Allah are neither people of the special kind nor have they any special distinctive signs, as is generally thought by some people. In this respect, the ignorance of the general public is shocking because they regard even such persons as favoured of Allah who not only neglect the religious obligations and the practice of the Prophet (PBUH), but also woefully lack cleanliness. Sometimes they call even mad or half-mad persons as favourites of Allah, whereas a Wali in the true sense is one who is meticulous about observing the obligations and is fearful of Allah. This Hadith brings about the following points: Firstly, the love of those whom Allah loves entail the love of Allah, and hating them entails the hatred of Allah. Secondly, when a true Muslim acquires nearness and love of Allah by means of performing religious obligations, supererogatory and voluntary prayers, Allah then becomes his special helper and protects his limbs and organs and does not let them work for His disobedience.