The had?th was also considered as weak by Ibn As-Sal?h, An-Nawaw?, Al-‘Ir?q? and others. (1)

Additional Points:

[4/ 15] the Ma’m?m does not have to take a Sutrah in the congregational Sal?t for this falls under the responsibility of the Im?m. It is a widespread misconception that each Ma’m?m is a Sutrah for the one behind, then what about the first row of the praying muslims?? Besides, this misconception entails that walking between rows is prohibited; the opposite of which is firmly established in many ah?d?th. One of these ah?d?th is narrated by Ibn ‘Abb?s who said: ‘Al-Fadl and I once came to ‘Arafah riding a she donkey. The prophet ( - صلى الله عليه وسلم -) was performing his congregational Sal?t. We dismounted the she donkey, walked between the rows and joined other muslims in their Sal?t. (The she donkey passed in front of the first row). (2) the prophet ( - صلى الله عليه وسلم -) said nothing to us’. (3)

It may be raised that the prophet ( - صلى الله عليه وسلم -) may not have seen the donkey passing in front of the first row. The answer to this is that the prophet ( - صلى الله عليه وسلم -) could even see that which is behind him. He ( - صلى الله عليه وسلم -) said to his Sah?bah: ‘Do you see my Qiblah here, by All?h ( - عز وجل -)! Nothing that you do in Ruk?’or Suj?d that I can not see; indeed I can see you from my back.’ (4)

Ibn Abdil Barr said: ‘Ibn ‘Abb?s’ narration specifies that of Ab? Sa‘id’s which says: ‘when you perform your Sal?t never let any one pass in front of you’, for the later had?th concerns the Im?m and the Munfarid [the one who does his/ her Sal?t individually]. As for the Ma’m?m, his / her Sal?t is valid no matter who passes in