Imam Dhahabi رحمہ اللہ said after mentioning two Asaneed:
في الإسنادين ضعف من جهة زاهر وعمر؛ لإخلالهما بالصلاة
In these two Asaneed the Zahir and Umar are daeef and they're daeef because they don't perform salah.
one of them yaani Umar bin mohammad was the teacher of Imam Dhahabi
-Seyr Alam An Nubala (10/317)
Via Shaikh Abu Temiyah
