AI 2492 then 6E 825 at Mumbai
Lucknow → Mumbai → Patna
Timetable, Mumbai time
18:55AI 2492 from Lucknow at the gate
17:556E 825 to Patna leaves the gate
23 h apart on the timetable, overnight
6E 825 leaves 23 h after AI 2492 arrives on the timetable: more than half a day, so not a connection we count.