数算俄梅珥

数算俄梅珥（）是一個出現在聖經妥拉利未記中為逾越節和五旬節之間的猶太習俗，預表耶穌基督成就律法上的事。時間上從安息日的次日即依照神的曆正月二十五日起算經過七個安息日，於次日(三月十四日)來到五旬節期(初熟的節期)，歷時共50天。

這項誡命來源為希伯来聖經: ，開始於安息日的次日到安息日的次日，共計50天。

参考

• [http://www.thejc.com/judaism/jewish-words/48270/sefirat-haomer Sefirat ha'omer/Counting the Omer, by Rabbi Julian Sinclair, April 28, 2011; Jewish Chronicle Online]
• [http://www.jewishvirtuallibrary.org/jsource/judaica/ejud_0002_0015_0_15098.html Encyclopedia Judaica on Jewish Virtual Library]
• [http://mishkan.org/omer?title=Omer Spiritual practices and reflections for each day from Mishkan Tefilah]
• [http://chabad.org/holidays/sefirah/omer-count.htm The traditional liturgy from Chabad]
• Rabbi Eliezer Melamed - Peninei Halacha - [https://web.archive.org/web/20131218110647/http://ph.yhb.org.il/en/category/zemanim/02-the-laws-of-counting-the-omer/ Counting the Omer]