The one who has been away from his wife for a long time is told not to come to her suddenly
Question

                How sound is the hadeeth “Let not one of you come to his wife at night lest he find something he dislikes, and if he finds something he dislikes, let him bring four to bear witness…”?.
Praise be to Allah.This hadeeth was not 
    narrated in these words, as far as we know, but it was proven that the 
    Prophet  (peace and blessings of Allaah be upon him) forbade the one who 
    has been absent for a long time from coming suddenly, and two reasons are 
    given for this ruling:  
1 –
So that the wife can 
    prepare herself by cleaning and adorning herself to receive her husband 
    after his lengthy absence. 
It was narrated that Jaabir 
    ibn ‘Abd-Allaah (may Allaah be pleased with him) said: We were with the 
    Messenger of Allaah  (peace and blessings of Allaah be upon him) on a 
    journey, and when we came to Madeenah we went to enter (the city), but he 
    said: “Slow down. We will enter in the evening so that the one who is 
    dishevelled may comb her hair and the one whose husband is away may shave 
    her pubes.” Narrated by al-Bukhaari (5079) and Muslim (715). 
[omit explanation] 
2 –
So that a man will not 
    destroy his household by accusing his wife. 
It was narrated that Jaabir 
    (may Allaah be pleased with him) said: The Messenger of Allaah  (peace 
    and blessings of Allaah be upon him) forbade a man to come to his family at 
    night lest he appear to be showing distrust or seeking to catch them 
    unawares (doing something wrong). Narrated by al-Bukhaari (5243) and Muslim 
    (715). 
Al-Haafiz Ibn Hajar said in
    Fath al-Baari (9/123): 
The one who comes suddenly 
    after a lengthy absence usually finds something he dislikes. Either he finds 
    that his wife is not in the state of cleanliness and adornment that is 
    required of a woman, so that causes alienation between them, and this was 
    referred to in the words of the Prophet  (peace and blessings of Allaah 
    be upon him) in the hadeeth, “so that the woman whose husband has been 
    absent may shave her pubes and the one who is dishevelled may comb her 
    hair”;
Or he finds her in a state 
    that is displeasing. Islam encourages concealment of faults, and the Prophet 
     (peace and blessings of Allaah be upon him) referred to that when he 
    said: “lest he appear to be showing distrust or seeking to catch them 
    unawares (doing something wrong)” 
Ibn Abi Hamzah said: This 
    indicates that it is not allowed for a traveller to come suddenly to his 
    family at night, without any prior notification of his arrival. The reason 
    for that is what is referred to in the hadeeth: One of them went against 
    that and saw a man with his wife, so he was punished with that for going 
    against this order. 
Al-Haafiz said:  That is 
    also indicated by a hadeeth that was narrated by Ibn Khuzaymah from Ibn 
    ‘Umar who said: The Messenger of Allaah  (peace and blessings of Allaah 
    be upon him) forbade disturbing women at night. Two men did that and they 
    both found something with their wives that they disliked. 
He also narrated a similar 
    report from Ibn ‘Abbaas, in which it says: Each of them found a man with his 
    wife. End quote. 
Ibn al-‘Arabi (may Allaah 
    have mercy on him) denied that the reason for this prohibition was so that 
    one would not find a man with one’s wife, and he regarded the reports that 
    had been narrated concerning that as da’eef (weak). He (may Allaah have 
    mercy on him) said: 
I have heard from some 
    ignorant people – may Allaah forgive you for it and conceal it for you – 
    that the reason why the Prophet  (peace and blessings of Allaah be upon 
    him) forbade them was lest the women be exposed, as happened to those who 
    went against the orders of the Prophet  (peace and blessings of Allaah 
    be upon him). What has been narrated cannot be sound at all, and even if it 
    was sound, it could not indicate that the Prophet  (peace and blessings 
    of Allaah be upon him) was pointing to this meaning. 
It is not proper for anyone 
    who has any knowledge of the aims of sharee’ah and the status of the Prophet 
     (peace and blessings of Allaah be upon him) to regard that as sound. 
    End quote.  
‘Aaridah al-Ahwadhi 
    (5/365) 
And Allaah knows best.