There are 3 methods for searching Atla Religion Database using Scripture Citations.
First a bit of history - Atla Database began as a print INDEX tool and did not include a Scripture index in the print index. The Scripture Search option came AFTER Atla became a digital product. Therefore many of the older articles which address scripture passages are not included in the Scripture Search.
Old Testament Abstracts and New Testament Abstracts both have Scripture Indexes and a Scripture Search tool very similar to ATLA Religion Database
Christian Periodical Index includes scripture reference in the subject field. Use the Advanced Search, limit to the subject and type out your passage. Use Roman numerals for the chapter and Arabic numerals for the verse, e.g. Acts, III, 3. If you are looking for a passage in a book like I Samuel, type 1st or 2nd after Samuel, e.g. Samuel, 1st, XIX, 20-24.
To search by Religious & Theological Abstracts by Scripture Citation you'll need to use the Advanced Search
Bible Citation Format : When specifying using the examples below, please make sure that there are no whitespaces between any chapter and verse numbers; for example, you must use "Genesis 1:1-2:2" and not "Genesis 1 : 1 - 2 : 2".
(from Religious and Theological Abstracts help page)