Sunan Ibn Majah
1257
Sahih+3

It was narrated from ‘Ubadah bin Samit that the Prophet (ﷺ) said:“There will be leaders who will be distracted by matters and they will delay the prayer until after its proper time. So make your prayer with them voluntary.”

SahihAl-Albani
SahihMuhammad Fouad Abd al-Baqi