It is makrooh to pluck grey hairs from the head and beard
Question

                What is the ruling on plucking grey hairs? Is there any differentiation between the hair on one’s head and the hair of the beard?.
Praise be to Allah.
    Grey hairs will be light for the Muslim on the Day of 
    Resurrection, as is stated in saheeh ahaadeeth. In Sunan al-Tirmidhi 
    (1634) it is narrated that Ka’b ibn Murrah (may Allaah be pleased with him) 
    said: I heard the Messenger of Allaah  (peace and blessings of Allaah be 
    upon him) say: “If a person’s hair turns grey in Islam, it will be light for 
    him on the Day of Resurrection.” Classed as saheeh by al-Albaani in 
    Saheeh al-Tirmidhi. 

    In Musnad Ahmad and Sunan al-Tirmidhi (1635) it 
    is narrated from ‘Amr ibn ‘Absah (may Allaah be pleased with him) that the 
    Messenger of Allaah  (peace and blessings of Allaah be upon him) said: 
    “If a person’s hair turns grey for the sake of Allaah, it will be light for 
    him on the Day of Resurrection.” Classed as saheeh by al-Albaani in 
    Saheeh al-Tirmidhi. 

    Al-Bayhaqi narrated in Shu’ab al-Eemaan that 
    ‘Abd-Allaah ibn ‘Amr (may Allaah be pleased with him) said: The Messenger of 
    Allaah  (peace and blessings of Allaah be upon him) said: “Grey hair is 
    the light of the Muslim; no man’s hair turns grey in Islam but for every 
    grey hair he will have one hasanah and will rise one degree in status.” 
    Silsilat al-Ahaadeeth al-Saheehah (1243). 

    This hadeeth has supporting evidence in the hadeeth of Abu 
    Hurayrah (may Allaah be pleased with him), that the Prophet  (peace and 
    blessings of Allaah be upon him) said: “Do not pluck out grey hairs, for 
    they will be light on the Day of Resurrection. If a man’s hair turns grey in 
    Islam, for each grey hair he will have one hasanah and will rise one degree 
    in status.” Narrated by Ibn Hibbaan. Al-Albaani said in Silsilat 
    al-Ahaadeeth al-Saheehah (3/247): its isnaad is hasan. 

    It was narrated by Ibn ‘Adiyy and by al-Bayhaqi in Shu’ab 
    al-Eemaan that Faddaalah ibn ‘Ubayd (may Allaah be pleased with him) 
    said: The Messenger of Allaah  (peace and blessings of Allaah be upon 
    him) said: “Grey hair is light on the face of the Muslim, so whoever wishes, 
    let him pluck out his light.” Silsilat al-Ahaadeeth al-Saheehah 
    (1244). 

    These ahaadeeth indicate that it is makrooh to pluck out grey 
    hairs from the head and the beard, and there is no difference between them 
    in this ruling, because of the general meaning of these ahaadeeth; they do 
    not apply only to the hair of the head or beard, so it is known that the 
    ruling applies to both. 

    Al-Nawawi said in al-Majmoo’ (1/344): 

    It is makrooh to pluck out grey hairs, because of the hadeeth 
    of ‘Amr ibn Shu’ayb from his father from his grandfather, that the Prophet 
     (peace and blessings of Allaah be upon him) said: “Do not pluck out 
    grey hairs, for they will be light on the Day of Resurrection.” It is a 
    hasan hadeeth that was narrated by Abu Dawood, al-Tirmidhi, al-Nasaa’i and 
    others with hasan isnaads. Similarly our companions also said that it is 
    makrooh, as was stated clearly by al-Ghazaali, al-Baghawi and others. If it 
    were said that it is haraam because the prohibition is stated so clearly, 
    that would not be far off the mark, and there is no difference between 
    plucking hairs from the beard or the head. End quote.