It is narrated from Mughith (may Allah have mercy on him), who thinks that Sayyiduna Ibn Umar (may Allah be pleased with them both) asked him about his master: He said, "Allah and so-and-so." Sayyiduna Ibn Umar (may Allah be pleased with them both) said, "Do not say like this, do not associate anyone with Allah. Rather, say: After Allah, so-and-so is my master."
Hadith Referenceالادب المفرد / كتاب الأقوال / 782
Hadith Gradingالألبانی:ضعيف موقوف
Hadith Takhrij«ضعيف موقوف : الصحيحة تحت رقم : 138 - ن»