Some context here. As bdm points out above, it looks like the April 5, 1983 game is the one in question. (Bird had 39 points in that game). This was Nique's rookie season.
http://www.basketball-reference.com/boxscores/198304050ATL.htmlBut, this was actually the sixth meeting of the two clubs that year. Here are some facts. (Note that rebounds, assists, steals etc. are often not available for these individual games from that era).
Game #1: Celtics victory, Bird 21 pts on 9-21, Nique 22 pts on 10-22.
http://www.basketball-reference.com/boxscores/198210300ATL.htmlGame #2: Celtics victory, Bird 30 pts 15 reb on 9-16, Nique 8 pts on 3-8 shooting
http://www.basketball-reference.com/boxscores/198212010BOS.htmlGame #3: Celtics victory, Bid 10 pts on 3-18, Nique 17 pts on 7-21
http://www.basketball-reference.com/boxscores/198212180ATL.htmlGame #4 Atlanta victory, Bird 29 pts 16 reb 5 ast, Nique 18 pts on 8-16
http://www.basketball-reference.com/boxscores/198302060BOS.htmlGame #5 Celtics victory, Bird 25 pts 13 reb 9 ast, Nique 12 pts on 5-11
http://www.basketball-reference.com/boxscores/198303230BOS.htmlInteresting that Bird would choose that 6th game to really ratchet up the trash talking. He'd pretty much owned Nique in three of the previous games including the last two, drawn once and been outplayed once (at least going by the admittedly imperfect box scores).