Al-A'raf 7:178

Man yahdi Allahu fahuwa almuhtadeewaman yudlil faola-ika humu alkhasiroon

Whoever Allāh guides - he is the [rightly] guided; and whoever He sends astray - it is those who are the losers.

The one whom Allah gives guidance is the one on the right path. As for those whom Allah lets go astray, those are the losers.