The central probe agency, they said, has now asked her to appear on October 16.
Rabri Devi, the wife of RJD chief Lalu Prasad, has earlier twice skipped the ED summonses in this case.
It was not immediately clear if she furnished any reason for her absence today.
The ED had yesterday questioned her son and former deputy chief minister Tejashwi Yadav for about nine hours inconnection with this case.
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The ED hadregistered a criminal case against the Lalu Prasad family members and others under the provisions of the Prevention of Money Laundering Act (PMLA) sometime back.
It hadearlier questioned a few people in this case includingthe wife of former UPA minister P C Gupta.
The agency had taken cognisance of a CBI FIR in this regardto initiate its own criminal complaint.
In July, the Central Bureau of Investigation (CBI) had registereda criminal FIR (first information report) and conducted multiple searches against former Bihar chief minister Lalu Prasad and others.
Rabri Devi, Tejashwi Yadav and others will be probed by the agency under charges filed in the Enforcement Case Information Report (ECIR), the ED equivalent of a police FIR.
The case dates back to the time when Lalu was the railway minister in the UPA government.
Others named in the CBI FIR include Vijay Kochhar, Vinay Kochhar (both directors of Sujata Hotels), Delight Marketing company, now known as Lara Projects, and the then IRCTC managing director P K Goel.
The CBI FIR alleges that Prasad, as railway minister, handed over the maintenance of two IRCTC hotels to a company after receiving a bribe in the form of prime land in Patna through a 'benami' company owned by Sarla Gupta.
The ED, under the PMLA, has powers to attach and confiscate tainted assets and it is expected that the agency will initiate such a move once it makes progress in the case.