Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
The swallow in a dream is a faithful, ascetic man. Its entry into the house indicates blessing and goodness.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
The swallow indicates a man who enjoins good and forbids evil. Whoever catches one will marry a righteous woman.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
The swallow is interpreted as a righteous man. Seeing it indicates security and blessing.