Réstan

According to the Old English Dictionary:

(?)

réstan

to exult :-- Hæfdon beorgas blíðe sǽle and rammum ðá réstan gelíce montes exultaverunt ut arietes, Ps. Th. 113, 4. [Grein compares the word with O. H. Ger. hlút-reisti, -reisig clamosus, canorus.] restan