"Some JD(U) leaders had got new kurta-pyjama and bundi (Nehru jackets) stitched for the swearing-in ceremony, but the invitation did not come," he said.
Kumar had yesterday said his party had not been invited to join the Modi government nor was it consulted about the recast its recast.
"Why should Prime Minister Narendra Modi or BJP chief Amit Shah consult Nitish Kumar when they know his character," the RJD boss, who has been unsparing in attacking Kumar ever since he walked out of the 3-party 'Grand Alliance' in Bihar and formed government with the BJP, said.
Days ahead of the BJP's national executive meeting in Patna, posters had surfaced thanking Modi for a Rs 5 crore donation for Kosi flood victims. Kumar found it in bad taste and cancelled the dinner which was to be attended by senior BJP leaders including Modi.
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Lalu claimed that Modi had not forgotten the "slight".
Modi was right in not accepting the invite for lunch with the chief minister at his official residence recently after the two made an aerial survey of the flood-affected areas of Bihar recently, the RJD leader said.