Based on the provided legal document, the key points are as follows:

1. The property in dispute is confirmed to be joint in nature, with no partition having taken place (!) (!) .

2. A co-sharer can only sell his share of the property; selling a specific portion without partition is not legally valid. The sale of a part of the property beyond the extent of his share is void unless partition has been effected (!) (!) .

3. The sale deeds executed by the defendant No. 1 in favor of defendant No. 2, and subsequently by defendant No. 2 in favor of defendant No. 3, are not void, provided that these sales were within the extent of defendant No. 1's share and no sale beyond his share was made (!) .

4. The courts have held that unless and until the property is partitioned, a co-sharer can only sell his share and cannot sell a specific piece of land. The actual determination of the specific land sold will occur only after partition (!) (!) .

5. The judgment directs that if the defendants file a suit for partition within three months, the purchasers will continue in possession of the land purchased until the partition is finalized. The exact portion of land to be allotted will be decided after partition (!) .

6. The findings and judgments of the lower courts, which concluded that the property remains joint and that the sale deeds are valid within the extent of defendant No. 1's share, are affirmed (!) (!) .

7. The legal principle emphasizes that, in the absence of partition, a co-sharer cannot alienate a specific piece of the property, only his share, and any sale beyond his share is void. However, in this case, there is no evidence that the defendant No. 1 sold beyond his share (!) .

8. The courts have also clarified that a purchaser of an undivided interest does not acquire possession of a specific part of the property until partition occurs; their right is to seek partition and obtain possession thereafter (!) (!) .

These points collectively clarify the legal stance regarding joint property, alienation rights of co-sharers, and the procedural approach to resolving disputes over such properties.