Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
The Qibla in a dream indicates what a person turns to, such as a leader, a wife, or travel. Praying towards it indicates uprightness in religion. Turning away from it indicates misguidance.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
The Qibla indicates obedience to God and following the Sunnah. Whoever sees himself searching for the Qibla is confused about his religion.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
The Qibla is interpreted as the wife or a position. Whoever sees himself praying towards other than it is committing a great mistake.