From John Malalas Chronographia p.25ff Dindorf, now II.3 Thurn (16); cf. Jeffreys et al. (12) and Roos, Arrianea p.4,13.
Though the Suda manuscripts give the headword name as Sostris, it is clear from pi 671 and sigma 268 (not to mention external evidence) that one should emend to Sesostris. See generally Herodotus 2.102-110, and A.B. Lloyd in OCD4 p.1356 ("Though based on several rulers of the Twelfth Dynasty called Senwosret, he ultimately became an embodiment of the ideal of Egyptian kingship much used in nationalist propaganda").
[1] The online Suda Greek text for the numeral here appears to be corrupted. Malalas here reads xilia/das ie' ("15 thousand"); cf. Dindorf (26) and Thurn (16). The Chronicon Paschale transmits xilia/das dekape/nte ("fifteen thousand"); cf. Chronicon Dindorf (84). However, John of Antioch Fragmenta ex Historia chronica reads muria/das e' ("5 ten-thousands"), as in Adler's Suda text; cf. fr. 8 Roberto (22-23). In her apparatus Adler notes that Malalas and ms G read xilia/das.