He does ghusl with the intention of removing both major and minor impurities, then a drop of urine comes out after that
Question

                I want to ask about ghusl (bath) after janaba (impurity after intercourse). I find that urine continues to dribble after urination. It stops if I squeeze my penis but I still feel it coming out, and it does not stop before 20 minutes. 

I want to make ghusl of janaba, and intend to purify myself of the minor hadath (urine) as well as the major one (intercourse). Is this permissible or do I have to make ablution after the bath because of the problem of the urine coming out? Knowing that I used to do this before, I used to make ghusl of janaba with intention of purifying myself of the minor hadath at the same time. Was that correct? 

If I intended to purify myself of the janaba, and while I am in the bath the time of dhuhr prayer comes for example. Is it permissible to make my intention then purifying of the minor hadath, or do I have to make ablution?  Help me may Allah reward you.
Praise be to Allah.If a person does ghusl 
    following janaabah, and intends thereby to remove both major and minor 
    impurity, then that is sufficient, whether he does ghusl before the time for 
    prayer begins or afterwards. See question no.
    88066. 
If you did ghusl with the 
    intention of removing both major and minor impurity at the time of duha 
    (forenoon) for example, then it is permissible for you to pray Zuhr with the 
    purification, unless it is invalidated by something that invalidates wudoo’, 
    such as passing urine. 
As for a drop of urine 
    coming out after doing ghusl, if you are certain about that, then you must 
    do two things: 
Wash whatever has gotten 
    onto your clothes or body, and repeat wudoo’ only, not ghusl. 
You should not pay any 
    attention to this feeling and you should ignore it, so as to avoid falling 
    into waswasah. You do not have to squeeze your penis until whatever is in it 
    comes out, or inspect it after you have finished relieving yourself, because 
    that opens the door to waswasah, so you should not pay any attention to 
    that. 
It says in Minah 
    al-Jaleel: When he has finished urinating and cleaning himself, he 
    should not pay any attention to anything that he thinks may have come out of 
    him and he should not check it again. End quote. 
It says in al-Mawsoo’ah 
    al-Fiqhiyyah (4/125): 
The Hanafis, Shaafa’is and 
    Maalikis stated that when he has finished washing himself with water, it is 
    mustahabb for him to sprinkle some water over his private part or pants, so 
    as to put an end to waswaas, then if any doubt occurs in his mind, he will 
    think it is because it is because of the water that he sprinkled, unless he 
    becomes certain that it is otherwise.  If he thinks that something has come 
    out after he has washed himself, then Ahmad ibn Hanbal said: He should not 
    pay any attention to it unless he is certain, and he should ignore it 
    because it is from the shaytaan, and it (the waswaas) will go away in sha 
    Allaah. End quote. 
‘Abd al-Razzaaq narrated in
    al-Musannaf that Ibn ‘Umar (may Allaah be pleased with him) was asked 
    about that and he said: If you do wudoo’ and sprinkle some water on your 
    private part, then ignore it, because it is from the shaytaan. 
Sulaymaan ibn Yasaaar said 
    something similar, as did al-Hasan al-Basri and Sa’eed ibn al-Musayyab. 
See: al-Mudawwanah 
    (1/120) and I’laam al-Muwaqqi’een (4/63). 
See also question no.
    93877. 
And Allaah knows best.