Vishnu sahasranamam, slok36

Slok36:             SkanDaha  SkamDadharo  Dhuryo  varaDo  vAyuvAhanaha
                           VAsuDevo   BruhaDbhAnu  rADiDevaha  PuramDaraha

The devatas' army chief " Skanda",  the one who bears inSkanda,  the valiant,  the one grants wishes granter,  
The owner of Flying vehicle , VAsudeva ( the devine inside the living being), the gigantic Sun,
the  Prime lord, the Ancient existence, is sree Maha Vishnu.

Here, " Skanda", is depicted as the destroyer of evil, being the army chief of devatas.
Vishnu is present in all of us as Vasudeva,  the devine inside us.
Hence, all our actions are watched by God, without fail. 
Vasudeva is the witness of all our actions, weather good or bad.

The celestial bird " Garuda" is Vishnu's flying vehicle. In puraNas also, it is said that Vishnu roams on  this Garuda.

Om Vishnave namaha