It is narrated from Mujahid (may Allah have mercy on him), he said: It is disliked for a person to look at his brother with sharp eyes, or to stare at him when he is leaving. Similarly, it is also disliked to inquire in detail: "Where have you come from and where are you going?"
Hadith Referenceالادب المفرد / كتاب الأقوال / 771
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«ضعيف : أخرجه ابن أبى شيبة : 26640 و هناد فى الزهد : 648/2 و البيهقي فى شعب الإيمان : 9580»