Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
The sieve in a dream indicates distinguishing between truth and falsehood, or knowledge and prudence. It is a servant who distinguishes between matters.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
The sieve indicates a man who divides people. Whoever sees himself sieving flour is ridding his wealth of doubts.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
The sieve is interpreted as a knowledgeable man. Whoever sees himself sieving something is investigating a matter.